I am living in Poland. Back in the 80s there was a constant economical crisis in entire Soviet block Poland included. In shortage economy people needed to manage somehow and we shared everything. I remember people tend to borrow from each other everything from sporting goods (like skis, camping equipment). This lasted some time after the system changed to capitalism. The first capitalist decade was really hard on people and the habits lasted.
Computers like anything else were also shared.
I remember briefly having an ZX Spectrum borrowed for fun in mid-80s. Then having Amstrad computer with green mono monitor and 70KB (??) floppy drive (!!!) borrowed from neighbor in exchange for my fathers car trailer (IIRC). Then Commodore 64 which we owned and played after school with school friends. Then we got an PC AT clone which I borrowed for few weeks to a relative who was writing a thesis and needed to use decent computer with word processor. I recall we used TAG editor country wide then mainly because it supported Polish punctation correctly. Then in mid 90s I remember that we use to gather all the RAM dices from friends in the neighborhood in order to put together a skateboarding zine (lizg) to pring. We needed the RAM to be able to load the DTP projects and standard single computer didn't ever have enough ram. IIRC 32MB was a standard then and some projects required 128MB or more.
Ah, that were the times...
Coming back to topic I think the real sharing (like multi generation) started when Polish market got flooded with cheap Famicon/NES clones and carts...