Try a Sony A6000 and see if the positive experiences you had are still that positiv.
I normaly don´t buy a camera to drop it.
Even engineering plastic is pretty good today.
But a slower AF, a way worse sensor than the Sony Exmor?
The EOS-M was already outdated on release day.
The EOS-M has nothing except AF for EF lenses and price that speaks for it.
Don´t fool yourself. The only reason to buy the EOS-M is when you have EF glass.
The topic is the EOS M's durability and high build quality. Do you have comments along those lines?
Sure, you can buy newer mirrorless bodies that cost more with better capabilities, but the M is pretty terrific little camera IMHO. I have an EOS adapter for mine, but almost never use it. The native M lenses are terrific. So, owning EF glass was not the only reason I bought the M, and I am very satisfied with the purchase.