it depends.
These days I primarily play in 3 mostly original bands where the cover content is right around 5% of the total material.
Jazz/Fusion/World Music - Americana/Roots/Pop - Blues Rock power trio. Each band has at least 100 tunes (Jazz/World Music band has over 120).
I sight read, and chord charts are the usual route. The Americana band uses the Nashville number system because the primary songwriter has that kind of background and she
will change keys on the stand from time to time (

... singers, whatta-ya gonna do ??)
I chart the tunes for the whole band when they are new, and for those that are dead simple 3 chord tunes (very few) we get off book very quickly (1-2 rehearsals)
None of the bands puts charts on the stand, we rehearse tunes until they can be done off book. I tend to agree that music stands on a gig can be a poor visual (but IMO it's not a sin or sign of unprofessional-ism or anything like that.)
Also, as a long time player (45 years) who is getting older (58), with lots of different music going on in my life constantly, I will often mark my set lists (which are usually taped on the floor by my mic stand) with the key of each tune and the opening chord, just to help my aging memory out a bit.
OTOH, as some have said, for a pick-up Jazz gig, Big Band, or a casuals gig where the BL might have 500+ tunes to call, it's almost mandatory to have charts available or you can find yourself in a very unfortunate situation. So, on those gigs, I welcome a well organized book.