I am responsible for a domain which has an SPF record as recommended by various other services that send mail on this domain's behalf.
When setting up Mailchimp, I was surprised to find no documentation on Mailchimp's recommended SPF setup. When I contacted support I was told that Mailchimp basically considers SPF legacy, hasn't used SPF for 6+ months, and thinks having the record doesn't help or hinder. Even going so far as suggesting that I delete our SPF record altogether.
I don't doubt that Mailchimp knows infinitely more about email deliverability than I do. But I find it surprising that Mailchimp wouldn't publish anything explaining this decision, especially considering that every other provider that sends email on our behalf continues to recommend the use of SPF, including G-Suite.
So what's going on, is SPF useless in 2020, should I worry about not having Mailchimp's servers in our SPF record, and should I consider deleting the SPF record altogether?