I'm one if their users lol. If the only concern is those future spam sms and phishing attempts it's useless, unless the security was breach to the extent that malicious attackers hold those confidential security data then i'll consider myself to migrate to other app.
Bear in mind that this was not the first breach that Authy suffered. There have been a few already[1][2] and, to my books, more than 1 would be enough to convince me that they are not worth to have my data, let alone considering the type of service that they offer. Again, this is purely by personal opinion. The fact that you have to rely on a "non official" tool to export your 2FA codes[3][4] is just ridiculous and shows how deep they want you to be locked in to their app.
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Talking about to migrate, whoever have the experience of using Bitwarden, saw it as recommendation from the comments in that article posted in OP.