that way your OTPs are less secure

Aegis backups are encrypted. One could argue that storing OTP seeds in someone else's server is even less secure, which is what Authy does.

because of security

Yeah, I read that too when choosing OTP managers and I'm not convinced. These security reasons they give to practice vendor lock-in just sound very convenient to them. They could very well add a secure bidirectional data import/export functionality like Aegis does. If they are really concerned about account takeover, they can confirm user identity, add delays with notifications before exporting, or add any similar bureaucracy. But if password managers allow exporting entire vaults, an MFA app can allow the same for OTPs.

And I insist on this feature because manually resetting over 40+ MFA codes that I have because there is no export feature is a REAL PITA.