I think most applications (including computers, except GPS receivers internally) should just switch to UT1. A rotation of the earth takes a day, and a day has 8

I think most applications (including computers, except GPS receivers internally) should just switch to UT1. A rotation of the earth takes a day, and a day has 86400 seconds. Done. (Fine, a second is not exactly an SI second, but close enough for most practical purposes, and computers can handle it.)