Earlier quoted context omitted.
I would say the entry level workstation line today is Mac Studio (starting at $1999), not Mac Pro, which is strictly top end. The $6999 model of today is not equivalent to the old entry models in any way, unless you just go by bulkiness.
Why "not equivalent"? Both are top-tier workstation options of their times. But... the UX of PowerMac G5 is lot more pleasant and everything feels lot more responsive than on modern Pros. Probably because of lack of signature verifications, SIP, RPC with Apple servers. But still, those machines _feel_ better.
The Mac pro is just a Mac studio with a "PCI express expansion chassis" bolted on which is of no use to most people. The price says Apple doesn't want to sell a lot of those machines, they probably only fitted a M2 CPU in an old Mac pro chassis to tick off the 'entire range migrated to Apple silicon' promise.