My Heathkit H89 had a Z80, 16K of RAM and a built in cassette interface. And we liked it.
(Not even joking, by the way - literally how I got into computers and programming.)
you kids and you petabytes of ram! back in my day....
/s
(i'm looking forward for these comments to be commented on a certain website i'm not supposed to name)
ZX81: Z80/1KB RAM... more recently though PIC12 (C501 IIRC) ...