You'd be surprised how many short, memorable domains are still available on new gTLDs. E.g. there are several times more possible 4 letter strings than total .d

You'd be surprised how many short, memorable domains are still available on new gTLDs. E.g. there are several times more possible 4 letter strings than total .dev registrations that even exist. And if you're willing to use numbers this gets higher, let alone 5 characters or more.