If the Triumph still works for you, ride it! I rode my '93 ST1100 for 11 years and 101,000 miles. Sure, I had a dirtbike as well for a few years in there, and a really crappy V65 Sabre for a year, but the one or two secondary bikes, but the ST1100 was basically it. The ST took me on many, many long distance trips, countless weekend rides, commuting, and even a track day. Great bike.
Eventually I bought a used FJR1300, but it still took almost six months before I could bring myself to sell the ST. It took me that long to make sure the FJR really suited me better than the ST.
Bottom line: If it ain't broke, don't fix it.