[2021] The lack of info is worrying me.

Has it though? Not saying it's right or a good thing, but considering we went 12 month stretches of total darkness and our last update was on December 8, I don't think there's any cause to worry. Keep in mind that many of us around the studio were out of office for 2 or more weeks to end the year and then it takes time to get back into the swing of things, etc.
We also confirmed our Fall release window in that update, so now it's clear we have some runway ahead of us and some time to go. That said, we're committed to at least monthly high level updates and the next "Inside Infinite" is coming out this week! This month we're talking with members of the sandbox team to share some insights into their vision for Halo Infinite and the work they're doing. To manage expectations, this won't have world premier big screenshots or huge things like a date announce, but our goal is to offer our community more context and insights into our team and the game we're making while we're all awaiting the larger beats and full marketing machine later this year.