By now it is probably no longer news to many: GNOME Shell moved from GJS’ own custom imports system to standard JavaScript modules (ESM).
Extensions that target older GNOME versions will not work in GNOME 45. Likewise, extensions that are adapted to work with GNOME 45 will not work in older versions.
You can still support more than one GNOME version, but you will have to upload different versions to extensions.gnome.org for pre- and post-45 support.
Please file bugs with your favorite extensions or have a friendly conversation with your extension writers so that we can help minimize the impact of this change. Ideally, you could help with the port and provide a pull or merge request to help maintainers.
Yeah, but not a full-fledged GUI OS with all your basic GUI tools, including a GUI web browser. QNX had a floppy version back that that fit everything - even a bunch of games - on a single 1.44MB floppy.
In saying that, there are modern GUI OSes which you can fit on a floppy, such as MenuetOS and KolibriOS. And because they’re coded fully in assembly, it can actually fit and do a lot more that what QNX-floppy could do back then, which is very impressive for modern code.