Worth reading: https://mobilejazz.com/blog/back-to-the-future-hooking-retro-machines-up-to-the-internet/#comments
Good read, nice to see some positive coverage of the interface, i still can't get over how good a piece of kit @Duke (http://www.cpcwiki.eu/forum/index.php?action=profile;u=1624) created with the M4. I don't know if it's a blessing or a curse that it's not well known outside of the CPC commmunity. I have not seen anything remotely comparable on the other retro computer, but I might be wrong on that but i haven't seen it to date.