RoC is an issue if you want to travel after your 2 year gc is expired while your 10 year gc is pending. While pending you get an extension letter. We are seeing more reports of airlines denying boarding to those with extension letters. USCIS is doing an excellent job of spreading the FUD: https://www.uscis.gov/i-131a
If you have an expired Green Card, you may not need to file Form I-131A. Although regulations generally require an LPR to travel with a valid Green Card, U.S. Customs and Border Protection (CBP) policy allows a transportation carrier bound for the United States to let you to board without carrier documentation if you are:
An LPR with an expired Green Card that was issued with a 10-year expiration date (and you have been outside of the U.S. for less than a year);
An LPR who has an expired Green Card with a two-year expiration date and you also have Form I-797, Notice of Action, showing that you filed Form I-751, Petition to Remove Conditions on Residence, or Form I-829, Petition by Investor to Remove Conditions on Permanent Resident Status (and you have been outside of the U.S. for less than a year). The Notice of Action extends the validity of the card for a specified length of time, generally two years; or
An LPR military service member or employee of the U.S. government (or an LPR dependent of such an individual) on official U.S. military or government travel orders, regardless of time outside of the United States.
Check with your airline or transportation carrier before you file Form I-131A because in some situations, they may still refuse to let you board even if you are in one of the categories above. In that case, you will need to file Form I-131A