Re: Not too worried here.
> Not sure what "full support" means
More than one OS release before it is orphaned! Well, for "full" OS releases for the foreseeable future, backed up by a history of supplying same - without orphaning the older SBCs as soon as the next model comes along. Official recognition of multiple OSes. Recognising the existence of and encouraging third-party add-ons. Supporting user forums, teaching materials (with the Foundation and the manufacturing sides working together).
> cheap SBC for desktop use, Pi is a great product ... many of us are still hoping that volume and targeted specing brings prices down and allows Linux-based SBCs to take up more utility functions
The various models of R'Pi aren't providing Linux-based SBCs to do utility functions? You mean, like all the utility functions that are discussed in forums (including The Register comments), the MagPi magazine etc?
Such as sitting in the heads of biped robots, alongside motor driver boards; in wheeled robots, running ROS; providing IP cameras with local storage and a bit of processing (motion triggering), for wildlife or security; to run BirdNET Pi and alert when interesting things happen in the garden; running DNS filtering and ad-blocking with Pi-Hole; running a NAS; running a PVR for Freeview telly using the official TV tuner HAT; displaying fun plasma patterns on an LED HAT; playing radio streams from the Internet; playing (badly) synth tunes with Sonic Pi and a touch keyboard HAT (Pimoroni have had some great HATs iver the years and I'm a sucker for a gadget). Those are just the things done, so far, with R'Pis in Corner Mansions: haven't (yet) got around to plugging in an SDR and joining the UK meteor-watch group, or building a cabinet for playing retro video games, or monitoring and graphing the heat distribution in the wife's composting bin (that is one I've promised her).
Thinking about it, aside from checking acquired kit is working, I don't recall *ever* using an R'Pi as a desktop PC. Shame, 'cos I got a monitor with a HDMI lead all ready to plug in, and I even have an official touchscreen in a nice case.
> Raspberry's vision already sparked one major paradigm shift.
A "paradigm shift" that went all the way back to the UK in the 1980s when we could get home microcomputers that were accessible (from the p.o.v. of the bits&bobs, not the price!), could be easily programmed by youngsters, had interesting I/O and lots of published, shared, projects on how to do fun things with them.
The biggest change that R'Pi did was going back to "the kids can gave a computer" with, to help lessen the anxiety and allow more than just the middle-class swotty kids to have one, an OS on SD (so you can screw up and not worry - our '80s boxes had to make do with ROMs!) and a *starting* price that doesn't break the bank. This was all discussed in the years & demos that led up to the R'Pi 1 being released.
> They launched countless careers and startups by giving the curious more room to tinker.
As they planned to, precisely as the '80s boxes did for that generation - R'Pi brought back what had been lost.