This last year has brought a new dimension to the whole argument as most sessions have been via digital media such as Zoom or Skype: so you can perhaps get away more with using lyric (or musical score) sheets and hope no-one notices that you are not doing a song (or tune) entirely from memory!
Depending where you put your crib sheet, people may or may not be able to detect that you are doing this: eye movements can be a give-away if you have a music or recipe stand out to one side, or lyrics down on your lap. Then there is "screen sharing" or putting the lyrics up in "Chat", so that everyone can join in: we do use screen sharing a lot in a couple of the instrumental sessions I do. (And there are people in the "tunes" world who have just as strong views about using written scores or not!!)
I'm not saying it's good or bad; it's just what happens.