John Ternus (SVP, Hardware Engineering) said "...making our transition nearly complete, with just one more product to go, Mac Pro."
So the 2018 Intel Mac mini still on the website may be an error, there may be no more Mac mini than the Mn-series SoC model...?
I don't think it's an error, two possibilities occur to me:
1. They have contractual amounts of parts in oversupply for the Intel Mac mini so they are continuing to sell it for an unspecified length of time - as long as it's gone before October they won't need to support the mini for another year in terms of macOS.
2. They will discontinue it at a future event - for example the day the Mac Pro replacement comes out.
3. They still haven't decided what to do with the upper SKU. The best case scenario here is that the M1 Pro is coming and it's going into the existing case or the rumoured smaller M2 case as the true 'upper SKU' Mini replacement.
Either way they are boosting the average selling price of the ARM Mac Pro by any other name and I don't blame them. To be fair, the Mac Studio spec that would suit me would be the 32Gb RAM/1Tb storage one - it's not horribly more expensive like the trashcan Mac Pro and 2019 Mac Pro.
They'd have had a lot of buyers if they'd offered a lower spec M1 Pro variant at a lower cost. As it is, the M1 Pro MacBook Pro 14" - connected to a monitor - becomes the alternative at roughly the same cost. But at least they have offered something rather than leave the headless version as an increasingly overpriced white elephant.
Most reviews of the M1 Pro MacBook Pro 14" have questioned the need for an M1 Max BTO for a significant segment of users as the benchmarks don't favour them. The M1 Max has much better GPU but given the option people would flock to the base model M1 Pro 14".
For the same money you get still adequate performance for must use cases, plus portability.