I unsubscribed three months ago (December 2023), directly in response to the news that ads were going to be rolled out (October-ish 2023). I just had to wait a couple of months for my subscription to expire.
I must have been a Prime Subscriber for about 14 years, so I thought leaving would be painful... but the opposite has turned out to be true. Bricks and mortar stores have changed a lot since I first subscribed to Prime. Most have got their act together and their click and collect services are more convenient for me than Amazon's deliveries. For everything from greetings cards, hay fever tablets and dry eye drops to clothing and electronics, local stores are undercutting or equalling Amazon's prices and I've got a feeling a lot of people (like me a couple of months ago) don't even realise it.
To be honest, even if Amazon does a u-turn (doubtful) and drops the ads, I don't think it will be enough to make me return. I was always disappointed with the video quality, the poor content organisation, the additional subscriptions required to watch some content, and a UI which seems designed to trick users into accidentally purchase stuff. Then they began making it harder for those of us who have no interest in buying stuff from third party sellers to filter out their stuff.
Good riddance, honestly. I feel like a fool for not unsubscribing years ago.