I hoped that using outlook as mail provider will boost the credibility of my emails so that they are not constantly marked as spam just because the domain is not widely used. This has not come true but I still have a free mail service behind my domain :)
What perks do you have that are not available any more but still work?
The new generations have very little chance here of ever obtaining a house of their own.
I'm sure that wasn't the kind of answer that you were looking for, but 'perks from the past' is potentially quite broad and for me this is the one that stands out above all of the others. Which is odd because housing is considered a human right and if you are relegated to renting then you will essentially be sucked dry for many many years.
Finally, last year, it was flagged and auto-upgraded to the new ridiculously-priced Prime plan. I meant to cancel the renewal but it ended up getting renewed before I remembered.