My emails forced me to, locking me out of accounts I needed to access.
Microsoft had me fill this form, to “prove” I was the rightful owner of the account, after some suspicious login-attempts from an African country. The form included fields like: name (I don’t think I supplied at creation, or a false one), other email addresses, previous passwords (which potentially yield completely unrelated passwords), etc.; only for the application to be rejected and locking me out of my primary email for a full month. After that outright violation, I immediately switched to Disroot, and haven’t had any of said problems ever since. I backup all its contents locally using Thunderbird, and delete the origins from the server afterwards.
Many platforms have this messed up dark pattern, of revoking one’s access to a real-world dependencies, unless giving in to the service’s demands. Enforcement of 2FA is another one of those “excuses” for this type of misbehavior, and so is bot-detection.
With “deletion” you’re simply advancing the moment, they’re supposedly “deleting” your data; something I refuse to believe, they actually do. Instead, I suspect they “anonymize”, or effectively “pseudonymize” the data (as cross-referencing is trivial, when showing equal patterns on a new account; would the need arise). Stagnation wouldn’t require services to take such steps, and any personal data remains connected to you, personally.
For the Gmail account, I would recommend: not deleting the account, opening an account at a privacy-respecting service (using Disroot as an example), connect the Gmail account to an email-client (like Thunderbird), copy all its contents (including ‘sent’ or other specific folders) to a local folder (making sure to back these up periodically), delete all contents from the Gmail server, and simply wait for incoming messages, at the now empty Gmail account.
If a worthy email comes in: copy it over to the local folder, and delete it from the Gmail server. For used services, you could change the contact address to the Disroot account, and for others you could delete them, or simply mark them as spam (and periodically emptying the spam-folder). You may not want to wait for privacy-sensitive services, to finally make an appearance, and change these over to the Disroot address right away.
I’ve been doing this for years now, and my big-tech accounts remain empty most of the time. Do make sure to transfer every folder, and make regular backups!