That's just down right embarrassing for Apple. I don't know how else state that, Apple's most powerful and upgradeable computer is on intel and they've not yet produced an ARM based replacement.
I've noticed something about Apple's development process for products over the years. It's kinda last minute start from scratch kinda process.
- Mac OS X on Intel - this was someone who happened to compile OS X on a working x86 PC in a few hours and someone brought it up to Jobs attention. Its not like this was even strategic mission to switch to Intel. Its when they realized we are not gonna have a 3 GHz G5 and we'll never bring G5 to laptops they kinda made the last minute decision to switch to Intel.
- Trash Can Mac Pro - the mea culpa for this one was in 2017 and they didn't bring something to market until 2019, basically 3 years after. They likely realized the problem in 2015, but an actual plan didn't start until 2016.
- iPhone 4 and antennagate - I think they knew about this long before it launched, but thought how bad it could be? But fixed it by the 4s.
- Lamination issues with Retina MacBook Pro's - this was a notorious issue for the 2012 to 2015 MacBook Pro's, but it suddenly stopped with the 2016 Touch Bar MacBook Pro's.
- Butterfly keyboards - Apple kept at this for years and didn't actually have a solution until the 2019 16 inch and early 2020 MacBook Pro's.
What all of this is telling me is, Apple don't see the error of their ways until the product is actually released. In the case of the Apple Silicon Mac Pro, its basically 2013 all over again and what I think they had to do was actually start from scratch with Apple Silicon once again to engineer a product that fits the market needs of the user. Which means, it must be expandable and needs to play nice with other third party GPU's, needs to support RAM upgrades and storage, too.
2020 marks three years since Apple Silicon came to market. What that tells me is the Mac Studio and Studio display is analogous to the 2017 iMac Pro, a stop gap product. The iMac Pro came out in December of 2017 and the Mac Pro became available in December of 2019.
This suggest, work on an expandable Apple Silicon Mac Pro likely started in 2021, so, if its taking three years, the Apple Silicon Mac Pro is likely gonna be released in March of 2024 with M3 Ultra.