Hello! What kind of use case do you see for this keyboard? Is it primarily for work or for gaming? Would you carry it around every day? I personally like Topre keyboards. I'm currently using a PFU HHKB. However, gamers will probably find better options elsewhere. High-end keyboard enthusiasts may also dislike the plastic case, and unlike most mechanical keyboards, you can't swap the switches on a Topre board.

I feel like PBS NOVA is such an underrated show. I've been watching it my entire life, and hope it never goes off the air.

look at this slime mold solving a maze 

As someone who has was also afflicted by the dinosaur obsession as a child this is amazing and the ISO enter novelty is insane. Typing on this would absolutely have me feeling like a kid again. GLWIC, hope to see this again in the GB phase.

YO! Thank you so much. This is exactly the emotions I was hoping to see. Let's make it real!

If one of the pins on the MCU was bad, then all the keys in the column/row of the bad pin wouldn't work.

So you should look up what row, column the three keys are on.  If they are all on the same row or the same column, that's a sign of one of traces or controller being bad.  If any other keys in the problem row/col work, then you know the MCU isn't bad and its pins are soldered fine.  There would be no point in resoldering the controller in this case.

If a trace is broken, what will happen is that every key after the break will stop working.  So a single break could take out the last three keys, and only the last three, in the row/col.  That would be the most likely problem if they are in the same row/col, but other keys (before the break in the trace) in that row/col still work.

If the three keys are in different rows and columns, then it's probably the diodes that are bad (less likely) or not soldered properly (more likely).