Earlier quoted context omitted.
Maybe fewer people being able to attend in person will force more conferences to take accessibility seriously. WWDC seems to have taken this to heart, for example.
In general (it's complicated and it's not as simple as have a video camera in every session) tech conferences are doing a pretty good job of getting session content online these days. And, yes, Apple invests at least as much as anyone. It's not really a replacement for attending a conference live but it's a mostly inexpensive (money and time) way to get exposed to a lot of the formal content of a conference.
This is something that has troubled me about in-person conferences for a while: they are inegalitarian. If they’re not really about the content, the only people who get the true benefit are those already privileged enough to be able to attend. That means the purpose of in-person conferences is to compound inequalities. We should not have them.