This isn't new, the Mac Studios and Mac Pros use similar proprietary modules. Apple even sells the Mac Pro modules separately so you can technically upgrade the primary storage in an officially supported way - for a ludicrous mark-up of course.

https://www.apple.com/shop/product/MR393AM/A/apple-2tb-ssd-u...

In practice if you have a Mac Pro you're better off just getting a PCIe SSD instead for a fraction of the price. Retail for a very fast 2TB SSD is ~$150 while Apple wants $1000.

TBF even golden era macs had standard SCSI drives but with custom firmware so you couldn't just use any old drive.

I am not frustrated to see it, because I would not expect Apple products to have upgrade-able parts.

I still buy Apple anyway, since the amortized cost over the life of owning the produce is lower in my experience. Plus it runs a lot cooler and quieter.

I would have expected to see chinese copies flooding the market

looks like a standard M2 ssd, no?

thats the “garden” for you