I do all my commercial illustration work (and communication about such) on an iPad Pro. ClipStudio Paint gives the lie to the idea that a “real” program can’t run on an iPad, because it’s now identical to its desktop version – but superior because of the advantage being to draw with the Apple Pencil.
I willingly pay an open-ended annual subscription for CSP on the iPad, unlike the one-time-payment for the desktop version – about $120CDN a year, versus something like $150 for the one-off. There’s also a lower-end version available for much less.
Of course, all the kids who are comparing it with doodle apps scream in the reviews about how unfair it is to make them pay for something. Maybe the developer should frame the subscription as “BOX of GEMS!” and they wouldn’t mind. For me, I figure that’s a tiny sum to exchange for a tool that makes my professional work possible (and, admittedly, better).
Pretty much the only thing I use my desktop for these days is updating my website with Sparkle. It’d be nice to have everything on one device, but… I get it.