There was a time when blurred fonts were some of a (small) hype. The tricky part is that phosphor response isn't linear, but sinusoidal, and that you had to scale this with font size… (You could make this an axis with variable fonts, though.)
Since the VF extension requires a state machine that can modify the font, it might be able to accomplish that, but my very quick read of the spec didn't let me grasp whether the SM executes once, or whether you can run it repeatedly.
(I am not a sufficiently clever person, obviously, and you probably wouldn't want to burn cycles on simulating that anyway. Nevertheless.)
My formative years at uni were spent on VT320s, the smell of hot dust on CRT, the tick, tick, key click sound, the subtle off-white colouring, the tasteful thickness of it…
We spend a bundle, both on Charon VAX emulation and Bluezone Rocket terminal emulation. We used to run the Reflections terminal emulator, but that is up to $500/seat.
I was actually looking for a functional UTS-20 emulator for our OS2200, but that is another story.
MAME will tie the rs232 to an outgoing socket, and I ran it over stunnel to login to my VAX VMS.
I used to love this font but the fake scanline effect was eyehurty after a while. DEC Terminal Modern is the same font with a nice vector look that won't interfere with the scanlines when you use it in cool-retro-term.