Dude, they ARE the advertiser. That’s Google’s main business. They have no incentive to export ANY of your account data to 3rd parties. Business tell them what groups of people to advertise to, and their systems handle the rest. They’re open about how it all works.
I hated the transition. Tried every service afterwards and stuck with Amazon for a year or so until a bug on their end wiped all my recommendations and playlists. I gave YouTube music a shot and am pleasantly surprised by how far it’s come. The auto generated playlists are spot on to my tastes and all my playlists from the GPM days were there. They fixed a lot of the UI problems too. For me, the price isn’t bad at all for what they offer.
I used to prefer cotton and linen when I lived in the southwest, but now in the northeast its almost deadly. After the switchover to synthetics I realized how short the lifespan on natural fibers was. The Blaklader X1900 work pants I have use cotton ripstop as a base layer and it wouldn’t last more than 9 months without disintegrating, while the nylon parts looked brand new. Same with t-shirts, they’d start falling apart after 6 months or less sometimes. Probably the humid environment though.