Is there ever a case where you would want to accept an answer, but not upvote it?

Looking at the answers, comments, and votes on both, it seems most users here believe that when accepting an answer you are likely to upvote.

It may well be that in most scenarios, on some sites, the accepted answer is also worthy of an upvote from the question OP.
Some sites might have specific niches whereby an answer is either poor and worthy of nothing or a downvote, or good answers worthy of both being accepted and an upvote from the question OP.

But this is simply not "always" the case on all sites, in all tags.

Maybe it was more true 6 years ago when this was asked? That is perfectly possible and acceptable :)

So would it not make sense to have the "Accept" button upvote the answer too?

No, because the two functions serve entirely different purposes, and I'd like to retain control over being able to accept and upvote separately based on the given scenario.

Paraphrasing from another relevant answer of mine:

1. I upvote because the answer was good, helpful, useful, informative, etc
2. I accept an answer when it answered my question, but it's not necessarily a "good" answer so I'm not necessarily also going to upvote

So there most certainly are scenarios where accepted and not upvoting is perfectly reasonable.

For example, in a "link only" answer, the information in the link's destination may well answer the question perfectly, so the OP can accept because "this answered their question".
But it being link only makes it a poor answer and so not worthy of an upvote.
(This is of course based on no other answers present, etc).

Or, perhaps more simply, the answer is just worthy of "accept" because it resolved my problem, but the answer author took no time or effort to explain when doing so could have been useful to me and others. Perhaps the grammar is bad, or the answer is generally lazy as if "here, I cannot be bothered, this will do you".
In which case I do not want to upvote, but accepting the answer is fair.

The point is, no matter how rare it may or may not be that we accept but do not also upvote, the fact there are scenarios where this happens means we should not automate it.

Is there ever a case where you would want to accept an answer, but not upvote it?

Looking at the answers, comments, and votes on both, it seems most users here believe that when accepting an answer you are likely to upvote.

It may well be that in most scenarios, on some sites, the accepted answer is also worthy of an upvote from the question OP.
Some sites might have specific niches whereby an answer is either poor and worthy of nothing or a downvote, or good answers worthy of both being accepted and an upvote from the question OP.

But this is simply not "always" the case on all sites, in all tags.

Maybe it was more true 6 years ago when this was asked? That is perfectly possible and acceptable :)

So would it not make sense to have the "Accept" button upvote the answer too?

No, because the two functions serve entirely different purposes, and I'd like to retain control over being able to accept and upvote separately based on the given scenario.

Paraphrasing from another relevant answer of mine:

1. I upvote because the answer was good, helpful, useful, informative, etc
2. I accept an answer when it answered my question, but it's not necessarily a "good" answer so I'm not necessarily also going to upvote

So there most certainly are scenarios where accepted and not upvoting is perfectly reasonable.

For example, in a "link only" answer, the information in the link's destination may well answer the question perfectly, so the OP can accept because "this answered their question".
But it being link only makes it a poor answer and so not worthy of an upvote.
(This is of course based on no other answers present, etc).

Or, perhaps more simply, the answer is just worthy of "accept" because it resolved my problem, but the answer author took no time or effort to explain when doing so could have been useful to me and others. Perhaps the grammar is bad, or the answer is generally lazy as if "here, I cannot be bothered, this will do you".
In which case I do not want to upvote, but accepting the answer is fair.

The point is, no matter how rare it may or may not be that we accept but do not also upvote, the fact there are scenarios where this happens means we should not automate it.