This is not investment advice but... learn from my experience.
The longer I collect, the more I enjoy mechanical cameras.
Electronic cameras make practical sense because they offer consistent exposure and offer other automations.
But all film cameras are aged or aging. Electronics are mostly as reliable as mechanics, but once a custom electronic part is done, its probably game over. Examples:
Lens servo on a Contax T3
LCD on a Ricoh GR1
PCB on a Nikon F3
Analog dial on a Nikon 35ti