Many years ago, Ubuntu allows to install inside Windows partition. It creates image contains Ubuntu.
This idea is quite different. Made OpenSUSE (not Ubuntu) installation simple, but not made it error-prone or not so fast as possible.
Why people do not install Linux? Because they are searching way to install it as normal application, yes? But this shown many problems. What is the hardest way? Hardest way is start installation. So allow to install EFI OpenSUSE installer and set it as default boot entry. People would not search which key the should press to start installer from USB/CDRom.
So people downloads OpenSUSE installer. Start it. It will download ISO and allow to write it to USB/CDRom. Next, taking in mind user choices (USB/CDROM), it writes boot loader onto EFI partition, set this bootloader as default and reboot.
I never test WSL2, but I known about this possibility. But I wrote about normal installation. People do not known, which key use to ran BOOT MENU or enter to BIOS. For example, I do not use Windows. For people, who would like to switch, it could be game changer.
Which key to use to run the BIOS/UEFI boot selection menu or the BIOS/UEFI setup depends entirely on the users hardware (i.e. motherboard). It can be found in the documentation delivered with the motherboard/PC.
Additionally most machines show it on the very first screen after startup (at least all my machines do so).
Who read instructions/documentation? People rather will put these documents to trash and forgive. I think better, if there was installer, which prepare bootable USB disk and set boot to BOOT MENU or BIOS; or (better) to set installer as default boot target.
@Lachu Can’t, that maybe defined at a BIOS level, Legacy or CSM, not UEFI, USB Boot enabled/disabled. The end user needs to check.
Likewise if switching from Legacy to UEFI, better to set the target install media to gpt, rather than dos etc. Too many variables just from the hardware level.
Ok. Thanks. But there is not necessary to set boot from USB. I think rather, that installer will but real installer’s boot manager onto EFI partition. So there is not necessary to set allow boot from USB.