Two things that stuck with you ...

I think one major thing is that labeling something as accessible is a point in time label. Depending on someone's understanding of accessibility and changes in software, that label can be incorrect right after the label is given. It is important to keep up to date with accessibility - it is not a one and done. Regularly reviewing and revising is extremely important. Something else that I have noticed is that it is common to tell people to start small in making resources accessible. I am all for starting small with making something accessible. The problem I see is that too many people think that with a small act, they do not have to go beyond that. It is important to not just state to start small, but to have someone create an action plan of how they are going to continue to grow in their understanding and implementation of creating accessible resources.