Presets - why convertig them is so complicated and why converted presets aren't found then???

I am fine if Adboe thinks it need to change the format – and location – of presets in Lightroom. But - what i would then expect is a seemless trasition from a user perspective, which means, presets are automatically converted, replaced AND are then available. Lightroom is a paid software, not a freeware. Why i have to spend hours of my time to deal with this hassle?

I am using Ligtroom Classic in it's latest version 10.1 on MacOS 11.1.

I have about 2400 lrtemplate-presets, bought and self-created, organized in 57 folders (mostly the ones that were offered by the preset-vendors). 

There is no easy way to batch-convert them, keeping the folder structure. Instead i need to use that rather dumb Conv Free tool, going through each subfolder to to the conversion to .xmp. 

BUT - even after converting and placing the subfolders into the new Camera Raw preset location, the converted presets do not show up. None of 2431 presets, from different vendors as well as all my personally created ones! And yes, the "Store with catalog" is unchecked, "Show partly compatible presets" is checked. And yes, i have of course tried unchecking and checking both, severel restarts of Lightroom, still - nothings shows up!!!

That's insane!