Is the picofly chip reliable?

[PS4Xbox720]

I don't know anything about modchips.
I wonder if the old chips from the PS1 or PS2 days still work today.

 

[thesjaakspoiler]

I'm pretty sure that a PS1 mod chip chip will not work in a Nintendo Switch.
The way to hack the console is completely different.
The PS1 modchips were just replacing some ids that are send from the CD player to the CD controller.
The picofly uses a technique called voltage glitching which is basically shorting the power supply of the processor to cause a controlled malfunction. This allows for the modchip to execute some of it's own code that gives full access to the Switch.
The picofly works on most consoles but it needs some tweaking depending on what memory is used in the console or what model it is.
The 'old' HWFly didn't need such tweaks. But in general it works fine if you know what you're doing.
There is a sticky thread with all the details.

 

[Radiusxe]

Yes, moded PSX SCPH-9002 is still working today (+-24y old).