Agreed. One of our employees is visually impaired, and it is shocking how many Spas are entirely incompatible with a screen reader and standard keyboard nav. With a MPA, most of the things that a screenreader needs come for 'free' just by being standard components. When everything is wrapped in JS and is slightly different for each page, it's frustrating.

We have changed quite a bit of our software systems in the past 1.5 years, and I have dropped multiple vendors from consideration over accessibility. Many B2B SaaS salespeople just give you a blank look if you ask about usability for a blind user.