Presume using the 44x33mm (Type 3.6) IMX661 Sony sensor.
The sensor was announced/released March'21 and now we almost have Feb '23!
It is not fit for purpose - there won't be a global shutter digital back anytime soon and even then it does not make an X shutter obsolete as it still allows you to remote control the aperture.
It is a fantasy to hope that there soon will be a GS sensor and that X shutter lenses are dead weight. Pls. also note that the x shutter has become a product in its own right with Phase selling them at a very healthy margin to all tech cam manufacturers. There's an incentive also to not kill off that business.
Sony has yet to announce a true successor to the 150 megapixel sensor used in today's backs and it will take quite a while before a new back with that sensor then arrives.
It is more likely that we'll see a stop gap update in 24 (maybe 23, who knows) with same pixel count, but better I/O, energy efficiency, etc.
Phase currently de-emphasised bespoke photography / cultural heritage in favour of the B2B business given back sales went down during pandemic and given the recessionary environment and cost inflation which basically both impact sales to the user base of professional photographers.
Rodenstock just announced another price increase a few days back to its dealers, so lenses are further going to increase in price this year which makes any investment in the high end photo segment even more tricky if lenses get so expensive that many users are priced out. It is a niche product and as monopolist they can dictate pricing, unfortunately.
Can you say 20k lens for an x-shutter 138 or 15k for a 32 X shutter? Well, might be reality soon ... so that makes it clear why people move to Fuji and Hassy X. High end MFD is getting more and more luxurious ... and GS sensors are mainly used in quality control where no one needs a full format MF sized sensor with 200 megapixels ... it is about accurately checking products like seminconductors passing beneath a GS QC outfit which needs more DoF rather than physical sensor size ... so don't hold your breath for a photographic 54mm x 40mm sensor >150 megapixels. It is not going to happen anytime soon, if at all.