Yeah, the old keyboards were pretty complicated inside, but at least you could clean them without everything mushing together into a blob.
The old keyboards had real plastic and metal parts instead of little capacitive cushions inside cheap plastic blocks.

Whe I was a tech, we'd take the keyboard, remove the keycaps and immerse the whole mechanism into a cleaner. Of course this stuff was probably deadly, but that was back in the 1980s when no one thought about stuff like that. With new keyboards, the plastic stuff melts into a sticky blob that smells like airplane glue.