I think you might be talking about two different things: the mobile app provides more than just Dashboard access (notably presence and notifications), but the Dashboards are indeed just web pages. I don't see that changing--that's the way they've always been (long before the mobile app, which had long been poised as one way that would provide easier access to them) and that is what pretty much any third-party dashboard solution is, too (SharpTools, HousePanel, the former SmartTiles, ActionTiles on ST, etc.--and even Lovelace on Home Assistant, and I'm sure I could go on). You can also get to them without the mobile app (under Apps in the admin UI, find Hubitat Dashboard and then the "child app" for your particular Dashboard; when you click in here, you should find links for local/LAN and remote/cloud access; in the "old days" before the mobile app, it was often suggested you just bookmark one of these or put it on your homescreen, a trick that still works for direct access to that particular Dashboard).
In the meantime, I used Hubitat for a long time without it, and it still does what I need most of the time, and if time/resources are indeed a constraint I'd rather have that effort put into the core platform. But it's still on my wishlist.