Yes, i've looked into it some time ago and i have my PSVita in a firmware version that was hacked (even installed Quake on it :-P) and was also looking for similar stuff for my PS2. This is mainly because i already have those devices around (except the Switch, i was just curious about that one because of its popularity and really i bought the Vita because i was lured in by the free SDK for C# games... something Sony abandoned and -even worse- completely removed soon after i bought the device) and since i have them, might as well try to use them.
But i shouldn't have to go through all these hoops to write and install software on a device i own.
And even if issues are found in the future, you can't just rely on them and often the way to exploit them are too convoluted (take a look on how to install homebrew on PS2 for example - and note that this is the easy method that people figured out in recent years).
Yes, it's called "Free McBoot" and also includes a related variant to be installed on internal HDDs called "Free HD Boot". The system architecture may be a bit quirky, but it's nonetheless more capable than the raw numbers might indicate.
But i shouldn't have to go through all these hoops to write and install software on a device i own.
And even if issues are found in the future, you can't just rely on them and often the way to exploit them are too convoluted (take a look on how to install homebrew on PS2 for example - and note that this is the easy method that people figured out in recent years).