I am a Computer Hardware professional. I started working with computer technology in the early eighties. I have seen the evolution of technology starting with closed platforms like the game console era and then the move toward open platforms like the Home Computer Golden Age. In the last 5 or 10 years, I have witnessed technology changes that are slowly moving away from open hardware designs towards hardware that is locked down and can’t be modified by the user.
You say “dual”. Whereas I’m thinking more like…20-30 different OS’s. Maybe 50. Could eventually be 100. This may eventually sprawl across multiple PC’s. I’m very early in my days of mad scientist swapping. I just made Linux Mint yesterday, and tonight I’m going to try all these:
https://www.techradar.com/news/best-alternative-operating-systems
Except for the ones that cost money. Plus, I like the idea of inserting cartridges like an old school NES. It’s just satisfying.
That sounds like a nightmare to manage and keep up to date. I would consider using VMs or some other method instead of trying to multiboot dozens of OSes across different physical drives and devices.
Dual boot is a misnomer, you can put as many OSes on a disk as you like
https://www.howtogeek.com/187789/dual-booting-explained-how-you-can-have-multiple-operating-systems-on-your-computer/
And like your link says, you could even run them in virtual machines