Different people have different uses. For some, one of the following can be worth it in one round trip.
These are the benefits besides first class upgrade:
free luggage (with up to 8 companions)
comfort+ seats (72hr before, +1 companion)
lounge access (international trips)
Sky priority (including at security)
Skyteam elite +
And then something that’s even more valuable these days is IRROPS
First class upgrade is always a gamble but better on leisure routes.
Yeah that makes sense. I was just stating my experience as a current Platinum Medallion member. If you are a semi-frequent traveler in general but not enough to have Medallion status, you likely already have most of the benefits that Gold Medallion would give you.
Free Luggage: I believe it is 1 checked bag per person up to 8 companions which can be had from holding the AMEX Delta Gold or any other AMEX Delta cobranded card
Comfort+ Seating: My experience has been that given the surplus of Diamond Medallions, Comfort+ is largely filled with Platinum Medallions who choose that seating at the time of booking. Few more inches of leg room and free booze is nice if you get upgraded though
Lounge Access: Fair. Most people here have another card that gives lounge access but priority pass lounges with CSR, for example, are pretty mediocre. If you have an AMEX card with lounge access, you'll be able to use Delta lounge anyways but would have to pay for the companion that would otherwise come free with the status
SkyPriority: Fair. Expedited service for luggage drop off can be valuable. Faster security is less valuable as I'm assuming most have TSA Precheck
SkyTeam Elite+: Not sure what else this gets you