I sold my laptop and my replacement is a few days away due to a problem in shipping. My last experience with DeX was back in 2018/2019. I have an S22 and am pretty happy with how well it's performing. I find my S22 kind of laggy in general use but is actually running DeX pretty well.
I opened a Word document and got the "subscription required" except I am a single user MIcrosoft 365 Business Premium environment and was kind of surprised at the message - I should be fully licensed. I suppose I could use web based apps but, the Word app renders nicely in DeX. I don't have a personal 365 subscription. I guess I am in the greater than 10" screen limitation - is this a license issue or Microsoft just being jerks about protecting their space?