"much of it is still half-baked"

Imo, it's not. It's more like 80% baked. More than good enough for daily use, but not on the level of polish or quality of any of the market leaders. Proton Drive is not as nice and convenient as Dropbox, Proton Mail is not as nice and convenient Gmail, Proton Pass is not as nice and convenient as 1Password, and so on.

But each of their offerings are good enough to get the job done, the price is fair, and you get the added privacy.