I did know about Dylan's injury. It was actually fairy widely reported in 2018 when they skated (not particularly well) at Four Continents, as I recall.It wasn't a case of Dylan not wanting to continue his skating career; he suffered an extremely serious injury through a non-skating-related accident shortly before 2018 nationals. It was not widely publicized, but Dylan's girl friend (off-ice partner) talked about it a few years after it happened. She was in an airport, talking to him on the phone, when a multi-hundred-pound glass door fell on him. She got on her plane (to go home) not knowing if he was/would be alive when she arrived.
The injury effectively prevented I/M from qualifying for the Olympics and ended his career.
The good news is that he recovered and is now scheduled to skate in shows with Meghan Duhamel. This includes some upcoming holiday/charity shows in the US and the Canadian tour of Stars on Ice.
But as SnowWhite said, I believe it was also fairly widely reported that he wanted to call it quits after 2018 anyway, and that was part of what led to the Dylan/Kirsten split. Either way, in my opinion, whether he was looking to retire earlier than she was or not, she was not obligated to skate with him for the rest of her life.
Thrilled to hear he'll be back and skating with Meghan. Glad they can both get back on the ice.