Why in god's name would they do that? I miss the reader, too bad is not available in Linux

You can actually run Sumatra in Linux with Wine. It's just that you have to alter a path in the PDF association config to suppress one annoying error.

That's good to know, but it is way too much, besides I hate all kind of virtualization (Docker, Wine, VMWare), hate it. The only one I tolerate ins QEMU 'cause I can play with my toy OSes there. From time to I design a plan to make some sort of Sumatra version for Linux, but it is probably more bite that I could chew.

Good news, Wine is not an emulator! Wine is a linux implementation of (some) of the windows API

Even worse, at least in a emulator you are making native calls, with wine you need to pray the "compatibility layer" + the OS + the program play nice. I have never had a pleasant experience with it, every program sooner or later crashes with some obscure message about a missing DLL or something. I use Linux, but if a software is Windows only I simply discard it from my choices.

I don't use Windows software either, but you've been told that it runs with an error, and how to fix that error. Your past experience with other software is irrelevant.