Hi @sudarshan,
Thanks for the reply.
Let me clarify that there are Pro MFA and Enterprise MFA factors, which means that you should be allowed to use the Pro MFA factors without restriction. Please see this related post addressing this.
Now, if you require using Enterprise MFA factors, I can’t guarantee that you won’t be restricted eventually, but the limits aren’t being strictly enforced for the moment. There will be a warning, but that could change at any time.
If you’d like to prevent breaking changes when it happens, I would strongly encourage you to consider upgrading.
Thanks,
Rueben