Whilst I appreciate the fact you linked an alternative...the starting price is at ~100 EUR, which isn't exactly an alternative to a free piece of software
Is there any other software alternative you know of? Maybe someone mentioned something in the thread?
@cyrus The functionality in Ventoy is pretty close to one-of-a-kind. You can kind of mimic it with GRUB though. There's also a tool called Glim (https://github.com/thias/glim) that apparently makes setting up GRUB in this fashion easy. I haven't audited the code and can't vouch for its safety, but it might be worth looking at.