My DAW has always been my internet computer too until a couple of years ago, out of necessity. Nothing dreadful or exceptionally bad ever happened, as I was careful, but I promised myself that some day, I'd buy a dedicated computer and treat it like a simple hard drive recorder: no OS upgrades, only the strict minimum in terms of software and no internet, save for authorizations.
Otherwise, it's like opening a can of worms and you find yourself installing and upgrading all kind of things and adding clutter...
I bought my DAW in 2014 and it works exactly as it did when I first got it and I want to keep it like that. I don't even want to think of it as a computer.
My MacBook Pro is now my internet machine. Of course, the screen is tiny by comparison, but, hey, it's only internet. It's not as if I had to work on graphics or video.
And I've also just inherited a friend's old XP laptop, so that I'll finally be able to re-open old projects and run some PC-only synths that I was missing. That one is obviously kept offline, even though the big screen would probably make it a bit more comfortable for internet surfing...