I would recommend getting it. You never know where u will end up. I went to the FSDO at Dulles when the year was about up on my last F-16 check ride and added my Commercial Single Engine. I figured it would give me more points on an airline application. In fact i did max out the points on my airline apps. However, when I decided to open a Flight School, I was D**N glad to have done that. You never know. That was when there was a one year limit. You are right in that there is no time limit now. I don't think that will change. But, if you are near a FSDO that is familiar with the Military and will do it, DO IT! You may move somewhere the FSDO may not be so familiar with the MilComp and you may have to argue for exactly what ratings you get. Also, most FSDOs will not do it, you will have to go to a Designated Military Competancy Examiner and pay him some bucks to do it. Check out
www.militarycompetancyinstructor.com for more info. I have done hundreds of 8710s for guys and I would recommend finding someone that knows how to fill it out for you. It shuld be simple but alot get kicked back. I don't have a dog in this hunt, just giving some advice.