I did something similar.
I bought a vt510 and hooked it up to my raspberry pi. My intention was to get some kind of VAX VMS OS on there, but as i played around on linux i realised something.
It really really sucks.
I had been dreaming of such a set up since i had been at the centre for computing history[1] and got so much nostalgia for the old DEC VMS setup they had. There is so much emotion brough back from just touching those machines, from the way your muscle memory kicks in as soon as you put your hands over the keyboard.
I was so damn excited for this.
but it was awful, the lag was the big one, but this wasn't from my set-up, this actually was how it was, the previously suppressed memory came back, sat in the computer lab at college, that lag was there - but yeah after years of iterm2, tmux and the advancements in the cli space - going back to vt510 really really sucked.
But it was a pretty horrible experience[2], and really affected me actually, it made me think a lot about nostalgia and how we remember the past.
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[1]https://www.computinghistory.org.uk/
[2] please, these things are relative, it wasn't that bad, it just kinda sucked