I've never bought an apple product but I've worked at multiple jobs that provided me with a mac so I still want to see improvements in the mac ecosystem.
Also, I'm not a screenreader user but I am a web developer and screenreader users deserve the same experience as typical screen/keyboard/mouse users. Developing for screenreaders sometimes feels like developing for browsers use to be with inconsistencies and unimplemented standards. For browsers, it was Chromes launch that really spurred competition in the space that drove vendors to implement standards and interoperability so it seems reasonable that a new screenreader could provide the same outcome for screenreaders.