I was (and have been) succesfully modding CyberPunk 2077 for about a year ago now, with Limo, despite it not having 'official support' in the form of a preconfigured preset.

You just have to set up the deployers right, and point them at the right directory in your version of the game.

All on Bazzite, on a Deck.

I think my custom FONV mod count is approaching 200 now, lol.

It has occured to me that I should probably at some point just make a Viva New Vegas style guide for how to do this with Limo, instead of MO2, as the Mirelurked version of VNV does.

Limo is designed soley to work on linux.

NM is multi-platform, ie, linux is an afterthought, after Windows.

Also Limo currently 'actually' has more functionality with a much more broad variety of games on linux than NM does... in that it works for literally any game.

Both 'apps' have been in development for about the same amount of time, and Limo has delivered far more linux functionality, with far less jank and bugs, in the same timeframe, thus indicating Limo is much more serious about linux support than NM.

Just go look at the issues section of the github for each and you can see that for NM, there are tons of major problems with both the released AppImage and people trying to build from source on linux.

The Nexus folks either are not prioritizing linux, or are not very good at developing for linux, or both.

Half of all downloads on Nexusmods are Skyrim mods, it's by far the most popular game.

Here is the official roadmap

Baldur's Gate 3 as well I think

I'm trying to talk myself out of this perspective I have here. If you can help me with that, please do.

How about how it asks me to pay every time I download a mod, and makes me download each one in a collection even though they have a one-button feature? Same results, same total download size, but they turn it into a demeaning menial task. The only reason I can imagine for it is that they want non-paying customers to get bored and quit, cutting down on total downloads.
I can't really tell what value they're adding, since it's the modders and the collection indexers who do all the actual work to make the mods and make sure they work with each other. So they're a hosting service. And they provide... discoverability? But I've never discovered anything through NexusMods, I only used it after finding out that NexusMods was the only place I could easily get the mod collection I already knew I wanted. But it turned out it wasn't easy, and that that was a deliberate design decision to try to squeeze me for cash to make their manufactured inconveniences disappear. And that is something that I oppose on a moral level.
"But they provide the app that places the resources and they swap the executable out so it still launches through Steam!" No, SMAPI does that. It's the thing that places and runs SMAPI, I guess.

Well, enshittification usually only starts after a good while. If the parent company wants changes they can slowly press forward to achieve what they want, even if they are somewhat limited - those limitations are usually limited itself. E.g. WhatsApp data was seperate to Facebook at first, but slowly but surely they became more interlinked (at least internally).

Anyway, I don't know enough about Nexus Mods and their owners to have any idea where they're headed. As you've said, there's been no indication of them doing something shitty.