May I jump in on this one as well?
Choosing between using pegs over fine tuners does primarily have to do with keeping string after-length (the space between bridge and tailpiece) and resonance natural. As Suzanne said above, they do now have bridges that help make this possible, even with fine tuners.
There’s also another consideration for choosing pegs over fine tuners – string type. Fine tuners are most prominent these days on beginning students’ instruments not only because of them still learning how to tune, but also because most student-level instruments use metal-core strings. These are not very elastic, so they don’t take very much tightening or loosening to make a big difference in pitch. The fine tuners allow for slower, more precise adjustment where pegs are very clumsy. On the other hand, gut and synthetic-core strings are much more stretch. The effect is exactly the opposite of metal-core strings. Precise adjustment is much easier to accomplish with the pegs, and fine tuners can sometimes take too much effort to make even small tuning changes. You often see violins and violas with only one fine tuner on their highest string because those oftentimes will be the only metal or steel-core strings in the entire set. Violin E’s are very often bare metal, even when the other three strings are gut.