TL;DR: Apple Maps ads triggered me, a step away from what I liked most about them, no ads and privacy, so time to explore alternatives.
I have been happily living in the "walled garden" for many years, deeply invested in the ecosystem with icloud photos, files and backups, etc. I have been happy to pay extra for Apple devices just because things work so well.
But recently a few of Apple's decisions have are making me second-guess if I should explore alternatives, for example adding ads to the App Store and Maps. Also, whenever I use my Linux computers, the friction of trying to use Apple services from those is very high, sometimes totally impractical (photos from the iCloud web interface kinda suck) or impossible (no AirDrop in Linux).
I am currently testing a few things: using Immich for personal/local cloud photos, got an old cheap pixel phone to try out "degoogling" it as much as I can, using Proton services for calendar+mail+cloud files, KDE Connect and LocalSend for sending files between devices, even testing Asahi linux on one of my macs (those guys are wizards!). The experience so far varies from "OK" to "janky", but usable, and at least I have control moving forward.
So where do you draw the line? What would make you switch?
They all have ads now. If you went full Linux and GrapheneOS, you could probably avoid ads in things, but you'd definitely lose a lot of the ecosystem creature comforts that come with literally any other ecosystem combination.
That being said, I have devices from all ecosystems and platforms. I am a tech worker by trade, so I sort of have to in order to stay current. Escaping for me isn't a matter of leaving Apple. But, rather, it's a matter of de-prioritizing Apple. My Contacts/Calendar/E-mail/Notes ecosystem is driven by Apple. I could 10000% switch that to Outlook.com or Gmail with no problem at all. All of my pictures are in iCloud Photos. I'm not sure that I'd have an easier or better time switching that to Google Photos (I'd also need to subscribe to a similar Google Drive storage plan). These are all manageable; though, it's not a simple weekend project.
The two things, for sure, keeping me tied to Apple are (a) the Apple Card and (b) my ability to answer calls and iMessages on my Mac and iPad mini. Other than a Lenovo Legion branded tablet, there's no real competitor to the iPad mini (and literally no competitor with a cellular option). If there was, or if I was to go with a different cellular Android tablet (likely a 11" Samsung Galaxy Tab S FE or a 12.9" Galaxy Tab S), I could figure out a system that is comparable to this with Android and Windows. Unfortunately, I can't manage my AppleCard without an iPhone. That one has me squarely by the balls.
I haven't gotten an Apple Watch yet. I do have a few AirPods models that would probably serve me less well ditching the ecosystem, but I have Galaxy Buds too.
Sadly, it makes more sense for me to stay begrudgingly than it is to leave. Though, I'm always jealous of those who are able to.
The one ecosystem combination that I'm always jealous of are the people who rock a Windows PC, an Apple iPad, and some form of Android phone, be it a Pixel or a Galaxy S. That combination, ironically, seems to allow for the greatest amount of freedom, while still allowing users to experience the best of those three device platforms.