There are a couple of tricks that can be used to extend the life of a clutch .
Often, the clutch disk , flywheel, and pressure plate get oil contamination on them, and either stick closed, or slip, and linkage adjustments don't solve the problem. I've dealt with the "stuck closed" problem by spraying lacquer thinner up through the bellhousing bottom access plate onto the clutch disk surfaces. The idea is to wash off as much oil and baked on oil as possible. I probably sprayed at least two quarts of lacquer thinner up into the clutch assembly, using a solvent spray gun attached to my air compressor hose. It works best if you can get the clutch disk to disengage, and keep the clutch pedal depressed while you spray. It worked for me, and I haven't had the clutch stick in the engaged position again for the last several years. (Mineral spirits would have been a slightly safer solvent to spray.) I've also heard of emptying a CO2 fire extinguisher up onto the clutch disk to clean off oil ,but I've never tried that .
I do remember well the first time the clutch on my Ferguson TO-35 stuck in the engaged position. I was pulling up to my garage door, the clutch would not disengage, and I poked a hole in the door with my front loader before I had time to pull the transmission out of gear ! That was not a happy moment.