Love this! Was in my bookmarks as I had to make a couple of codes late last year to slow the ball in arkanoid, so it could be enjoyed by someone who couldn't keep up. Needed to use FCEU to find the ball speed info and some online references to the 6502 ASM instruction set for substituting instructions to keep the ball slowed.
The HP Elite lapdock works well with Dex on the Note8 and Note 10. Samsung SW used to just mirror the phone display, but some Android update allowed Dex over any detected HDMI connection and has been working well since.
But these days generally prefer to run Dex on Windows instead of carrying another device. Would love to see Dex on Linux happening officially. The workaround, although admirable, seemed too clunky to try [1]