on the confirmation email it says interview invitations will sent until the beginning of april but past year data looks like they sent invitations feb at the latest. is this a change from previous years or have they always said this but functionally stop interviews before then?

to interview in April you must first first receive and schedule II in Feb. plus WL movement happens early may so they will stop interviewing before that (April)

are application updates for Einstein done through email or portal?

If you don't have an interview, they aren't accepted

Can I ask for source? I couldn’t find anything on their website.

MSAR and admissions office

Did anyone else not get a confirmation when uploading an update? not sure if it went through or not

do they accept interview thank you letters??

I emailed my interviewer directly saying thank you and he responded so it seems like they do

When are they sending more interviews?