Many federal web sites were very quickly altered or replaced by the new administration.
This is common. Work begins on some web sites immediately after the election. For example, when a new president is sworn in, the White House web site flips immediately.
More to the parent poster's point, it has been widely reported in the legitimate media repeatedly that many federal web sites have been replaced or significantly altered by the current administration. There's an entire pseudo-department for it that also makes headlines for its greater transgressions.
Add to that severe and sudden budget and staffing cuts, and like all government functions -- you get what you pay for.
All this is to say we probably shouldn't assume any current US government website, especially ones that have to do with immigration, hasn't been completely modified by this team.
he most certainly did not understand that the vast majority of what he perceived as "dead people getting benefits" were completely legitimate cases where beneficiaries were receiving those benefits and/or the data was encoded without a real birth/death date
since you appear to be of the opinion that Musk was somehow indicating a useful fact of some kind, here's mainstream media reporting of the claims made by Trump and Musk (we can assume Trump was advised by Musk) and their extreme inaccuracy:
https://apnews.com/article/social-security-payments-deceased...
No but I am glad he took action to fix it.
The Cobol 150 year thing is also incorrect and was widely criticized in tech circles: https://retrocomputing.stackexchange.com/questions/31288/did...