I can appreciate your efforts to re-create some of the gear that we worked with "way back when". However as a old-timer, I have done that a long time ago when I was learning what this hobby is all about.
I am hardware oriented, so the RasberryPi does not interest me much, but high performance gear constructed with modern parts does fit within my interests. In other words, I like modern designs that push the state of the art rather than things that are retro.

Yes, I have built the K1, K2, KX1 and all the options associated with those kits. I have a KX3 and a K3 and enjoy every minute with them. In fact, I enjoy a good business repairing those Elecraft legacy line kits.

So what am I saying? I enjoy hardware challenges, but I expect them to be state of the art designs. A regen receiver is fun to play with for a time, but the fun wears off after a short time. Making contacts with minimalist gear is just not my style.

Sorry if I have "rained on anyone's parade", but I do not see advancement of the communications art by constructing retro gear.

73,
Don W3FPR