The camera issue is real. Phone cameras are kinda bad, because they are very limited, and so, a lot of the beautiful magic comes from software. Samsung, quite horrible, put some magic into their kernel, as well as into their camera software. Therefore, one can't just use their proprietary camera app, on a different base system. You can't even shoot slo-mo videos either; I tried the S7 and now the S9 and neither can do it with LineageOS. The still images are not bad with OpenCamera though, although I can't say I'm a connoisseur either.

So full experience? No. But you can slap it on an older phone and enjoy a system that's never even supported officially, and now it's being updated every month. Some rough edges here and there. I'm personally a happy user.