Yes. Email addresses cost money to provide and use so if you want to continue to use it after you switch then why should you not pay for it. The easy way is to register a domain name then you get several addresses and you can get them by web-mail or an email client and if you wish you can make your own website. As they are not tied to your broadband prrovider you can change as often as you like.
OnePlus 5T review: Hands-on