I recently edited a post, https://electronics.stackexchange.com/review/suggested-edits/227123, an noticed that one of the comments was that
Neat, but does not warrant this two year old question to be bumped to the front page again.
And I agree! While I believe my edit improves readability, it doesn't improve the question so much that it's worth people spending additional time on it.
I've also looked around on meta, and found a few more people that share the same opinion on the editing of old questions:
I sometimes reject mediocre edits for users who go on an edit spree and digs up ancient questions that will just mess up the front page without any real benefits
I agree with @Camil completely. Sometimes questions only have one minor issue, such as a typo or non-capitalized "I". These are the ones I wish would not bubble up to the top of the active questions queue when edited, but nevertheless I feel should be corrected.
However, I've made a few edits on StackOverflow too, and I've never gotten the same reaction. Probably because the front page moves so fast there that it's not particularly important.
With the whole "collaborative wiki" aspect of StackExchange in mind, this incentive to reject edits due to edits bumping threads seems wrong.