Lots of VHF broadcasters switching to UHF as part of the transition? Not all have done so, but "many" have.
All things being equal, an ancient coax cable with X milliliters of water contamination or Y amount of corrosion will have more loss at UHF than VHF. Pretty much everything is more critical at UHF. Even antenna aiming.
The other way its a problem, which is actually pretty funny, is marketing of "HDTV" antennas where HDTV means UHF only, which works great if all your local broadcasters moved to UHF with the transition; As you can imagine a UHF antenna doesn't work so well if you live in an area with one of the few remaining VHF-Lo band transmitters which you "need".
To say this is a local issue would be an understatement. I'm sure you'd get a better answer from a neighbor than HN.
All things being equal, an ancient coax cable with X milliliters of water contamination or Y amount of corrosion will have more loss at UHF than VHF. Pretty much everything is more critical at UHF. Even antenna aiming.
The other way its a problem, which is actually pretty funny, is marketing of "HDTV" antennas where HDTV means UHF only, which works great if all your local broadcasters moved to UHF with the transition; As you can imagine a UHF antenna doesn't work so well if you live in an area with one of the few remaining VHF-Lo band transmitters which you "need".
To say this is a local issue would be an understatement. I'm sure you'd get a better answer from a neighbor than HN.