Saw this message on a USPS site about tracking. The postal service recently dropped "First Class -- Large Envelope" as long as envelope was a certain size and met a thickness standard.
They replaced that with another category -- costing $5 for the mailing and tracking.

Look at this link and if I am understanding correctly in order to use a tracking source, the sender now has to sign up for a scaled USPS registration and tracking plan to get updates. What do think of this?

https://tools.usps.com/go/TrackConfirmAction.action?tLabels=9400136105536012624037

If I am not correct, let me know. Or, perhaps someone can elaborate on this new change that's coming in April 2024.