[andreilys]

If the sender asks why you didn't respond, explain politely that you didn't see any notification until work started.

Come review time you will be dinged for not being a "team player".

Meanwhile the employee that does quickly respond to these messages will get ahead and eventually become your boss.

TBH if something is important enough, I have no problem with responding to it "After work hours", whether it's on the weekend or after work. In the same way, I have no problem taking a long lunch or sleeping in because I know it's a push/pull relationship with work. This is of course much easier to do when you're permanently remote so YMMV

[baby]

If these impact your performance then you work in a shitty place and there’s little you can do about it. Just don’t aim for a promotion or change job.

[pixl97]

Stuff like this impacts people at almost every job I've seen (and I've been contracted out a lot of different places and watched what employees do).

It turns out that it is typical for these behaviors to occur in workplaces, hence laws to prevent it.