Having been involved with e-voice for a long time, built and run websites myself, having your own domain name gives you an identity that's lasts as long as you want and should e-voice cease,you can migrate the base content to another platform (although you would need to migrate to a different content management system).

Companies like https://www.cloudnext.uk/ can offer a base package for about £40 pa with email etc and a domain for an extra £7.99 pa.

When looking at the range of domain providers look beyond the "fee" "only £0.01 per month" offer as you want the domain to be there for many years.

I also completely agree with all the previous comments and it's a good thing to have.