I do. Leaving LaunchBox behind was the thing that hurt the most when I left the Windows sphere a few years ago.
There are alternatives on Linux, but they all miss something for me or are not really maintained anymore.

Over the last two months I have been working on my own tool, and I just released the first alpha on GitHub.
If you are interested, I’d be happy to share what I have so far:
[Retromind](https://github.com/Dark574/Retromind)

Please be aware that this is a a really early alpha version of the tool...so handle your game collection with care

What the tool can do at the moment
- Fully flexible content tree on the left (you decide the structure)
- Treat anything executable as an emulator and assign it to any node in the tree (with inheritance through the sub-nodes)
- Mass import or manual import of media items (games, movies, ebooks, …)
- Assign graphics and music to your media items
- Flexible launcher logic for emulators and native programs (wrappers, env variables, Wine prefix support)
- Scraper functionality (currently IGDB, TMDB, Google Books, OpenLibrary – requires your own API keys, and more on the way)
- Optional BigMode / controller-friendly UI (only simple themes so far, but you can design your own in XAML)

Is this as good as Launchbox/Playnite...: Hell NO.
This tool has been in the works for about two months, there are probably a gazillion bugs and a lot of functionality is still missing.
But if you want to have a look and maybe give me some feedback, I would really appreciate it :)

here are a few screenshots
[Core-App](https://8upload.com/image/f6297ae72211d043/Core-App.jpg)
[ArcadeTheme](https://8upload.com/image/ecbf67dda61d7121/BigMode_Arcade.jpg)
[DefaultTheme](https://8upload.com/image/333d5f311ae09cb9/BigMode_Default.jpg)

Feedback, bug reports and feature requests are very welcome (GitHub issues are open)
[GitHub Issues](https://github.com/Dark574/Retromind/issues/new/choose)