I dont know; this seems like super specific case where you’ve economic means to afford or be around all of those high end systems and the same hardware is underpowered for your use case.

My first personal laptop had Windows 7 but as soon as Windows 8 came it struggled (only having measly 2GB of RAM) - so i switched to Ubuntu and it was a breeze for the next 10 years. I always used to try new version of Windows when released but it they always seemed to be memory hog and become bloated over time.

She looks 40 and i amazed she is not

Proprietary linuxes? What does that mean in reality? Do you mean android?

Kindly disconnect your internet :[