Recently I've been in a concert (1st row) and could see very good how the pros did it. Always 2 strings on one music stand and one of both was turning the page. The other string player continued playing, while the page turner had a small pause.
Interestingly, not all violins did turn the page at the same time. I had the impression the sheet music was printed with some offset for each music rest. Another thing, what I couldn't remember, was that one was turning a page back for a repeat. Maybe they did the layout in a way that a repeating section never required a page turn. Okay, this might be a waste of paper, but it optimizes for a minimum amount of turns.
Player1 I would think that a tablet would be better for performing but I don't have one yet so I can't really say that with any confidence.
This is a good point, and I am also not sure. The problem is that you only have one single page and unless you are using a huge tablet like the Galaxy Tab S9 Ultra, your pages are always smaller than a printed letter/A4 page. This and the fact you have only a single page makes you turn the pages a lot. IMO, especially the single page setup is the biggest weakness. There must be a reason why a company makes dedicated tablets (2 sided) for musicians: PadForMusician. I don't know if the software allows it, but you could turn only 1 page forward so you could read page1+2, then 2+3, 3+4, and so forth. This might be the best option for repeating sections that span over 2 pages.
For tablets, another option would be to layout the sheet music not page-wise, but section wise; meaning a start of a repeat section is the start of a "page" as well. In this case, the number of turn-backs is minimized, too. Or not using the repeat sign at all, but copy the notes over and over and only turn forward. But those options require the sheet music in digital form, not just as a photocopy of printed pages where you can't modify the layout at all.
To be fair, used in open air with some wind around, a tablet beats paper, hands down.
Bottom line, the problem with turning the page is as old as the piano itself: