Refreshing to see a top end drive from Solidigm, although odd. As this is the P41 with Solidigm software and controller tuning. I would have thought they would repurpose their own NAND rather than used Hynix.
Nice aggressive initial pricing as well for a top tier drive, this should be able to be found cheaper than the other 3 tops contenders (Sn850, 990 pro, & P41). Whatever happened to Kioxia(Toshiba) or Micron, they seem absent from the top of the line consumer pcie gen 4 ssd competition. Crucial P5 can't compete, not seeing any entries from Kioxia.
I think you may be misunderstanding the relationship between some of these companies. Solidigm is a subsidiary of SK Hynix created as a result of acquiring Intel's flash and ssd division, which to my knowledge was only making QLC NAND and Optane anyways. No controller either. So it's not weird at all that they use TLC Hynix flash and controller.
As for pricing, it is very competitive. The closest one at msrp is the P41 and that's $260. Granted these go on sale fairly frequently. Like the 2TB SN850x and P41 were $160 or so during Black Friday. I see the P41 pop up for around $210 too.
Kioxia doesn't really release to retail like this much anymore. They do have retail products, just not in high volume nor are competitively priced. Their history is fun too. WD acquired SanDisk back in 2016, who had a joint venture with Toshiba (Kioxia) for NAND fabrication and development which continues to this day. So WD drives have a custom controller with Kioxia's BICs NAND. You'll see the Kioxia name often though in pre-builts and laptops cause that's their target market.
Micron (Crucial) released the P5 Plus last year and it targeted the top 4.0 drives at that time. So the 980 Pro, SN850, and your pick of Phison E18 drive. It was competitive at that time and with its recent pricing is still a great value. It just so happens that everyone updated their drives this year. Samsung 990 Pro and WD SN850x. SK Hynix releases the P41 beginning of the year and now Solidigm with the P44. So mostly a case of bad timing on Micron's part is what gives you that feeling.