I spent a season skiing those boots!
Yes, it is time, past time, to move on!
What is it you like most about the boots? because there are other boots on the market now that can give you some of the advantages of the rear entry but with some advantages of a four buckle overlap design. Some folks who have difficulty getting into an overlap boot because of a high instep or inflexible ankle joint will find the new Nordica boot (can't remember the model name?) has rear entry benefits!
If your reasons were simply comfort, there are plenty of better skiing options these days that offer great comfort yet better envelopment. A goo boot fitter will be able to match up your foot to an appropriate boot for your needs!
Don't be afraid grasshopper, the grass is greener on the other side!!