Lenovo did pretty good with IBM PC support but Lenovo had been around for a while and had a plan. A lot will depend on who, if any, picks up the HP PC division. It looks like they plan on getting out of the consumer market (not enough margin). Wouldn't surprise me if Microsoft partnered up with someone or took it on alone.
I remember my first Compaq. Around 1993 as I recall. At the time it was the top of line PC and I wanted to add another hard drive. Found out everything in it was proprietary and had to order drive mounts. I vowed that would be the last Compaq I would ever own. And it was.