I feel the same with Win7 - for me "it just works" and I don't want to upgrade for as long as possible. I even don't install updates - especially since several of them contain telemetry. I simply don't have the time to fight with Linux. There were other good OSes (e.g. BeOS or OS/2) which were simply killed instead of open-sourcing the code. Haiku seems to be the successor of BeOS but it has too few donations.
You can support them by buying merch. I got a Haiku tshirt last year. I bought it purely to support out of nostalgia (I was on MacOS when Be was making waves and installed it to kick the tires once).
