Every single experience with GS support for the Apple Card has been at Comcast level. From the first experience to years later. Notably the message experience which may be more on Apple, where it's not email, but it's not also a chat, but something in between where you can wait as long as an email to hear back, but when you do, if you don't respond as quickly like a chat it ends it without telling you other than when you reply it starts all over again. Such a nightmare.
I was a big proponent (despite the Goldman Sachs vampire squid connections) for months and then all of a sudden they lost my bank details for making payments and I got charged a late fee + interest (has never happened for like decade+ on other cards) - customer service refused to reverse the charge and I quit cold turkey.
The hiding your CC# feature is cool, the card is unique looking (but I use Apple Watch Pay most times anyway) and the 3% extra off Apple products is a good retailer specific feature, but not my daily driver anymore.
Not sure I'll miss it if they switch to an even less savory servicer.
GS support for Apple Card made me change my Apple ID password to get my card unlocked (after it was wrongly locked for transactions in France while I was in France, which I though was THE ENTIRE POINT of Apple Card, that the fraud signals were tied to my iPhone) and that made it impossible to continue the chat!