The longer something has existed, the longer it is likely to continue existing. Going with Gmail or a custom domain is a really safe bet. There is no way I’d use an email service that’s less than 10 years old now.
My gmail account from when I was a kid is still active and working while most of the vanity/foss/privacy focused ones I signed up for have since died.
My gmail account from when I was a kid is still active and working while most of the vanity/foss/privacy focused ones I signed up for have since died.