My 2012 Mac mini was complete garbage, real piece of entry level, first run junk which started to flaw after six months. More impressed by the Thunderbolt Display I bought along side said machine... Rock solid and still kicking.
Having given up on a new iMac in 2018, I bought the maxed out 2018 Mac mini and have never regretted it. Fast, takes a beating and can run multiple tasks (and a server... so switched on 24/7). It has been used and abused but still up to the job and no doubt will last for years to come. I cant fault the mini's shell design... not sure what folks are asking for, a smaller one? less ports? a cube forcing storage banks and third parties to redesign, forcing customers to reinvest?
If offered, I would buy another maxed out mini should the larger iMac not reveal itself any time soon... so sick of waiting. The 24" model is a toy and that stand isn't well designed... Will the large one still have an unsteady stand? Will they resolve the sideway tipping on a larger display? Will it have decent customisation, ports etc.