Hey there.
I won't tell you the playerbase isn't low nowadays - it would be lying. Yet, don't assume that most players aren't RPers. From what I could see, there's quite a lot of players among the active ones who are RPers - be them apprentices or experts, that's not the matter ; yet don't usually appear to be RPing. I have some ideas about the reason why ; one is an awkwardness for RPing the everyday life, and I'm among the ones having this issue. I'm not much the idle talk type, nor are any of my characters. Another is, it is not always easy to RP something interesting when your character is typically a scientist, a mage, an artist or a rogue, or any kind of people who are way more interesting to play when their peers are around.
So yeah, I for example spends more time doing something else than RPing - yet what's the more interesting for me has always and will always be RPing. And when I'm not RPing, it's surely because I don't know what to RP and whom to RP with.
Also a bit because I don't feel legitimate to RP a character being talented in anything they have no IG skill in, but oh well, that is my own problem and I never asked anyone to think like me.