I know I have a leak in the hydraulic system somewhere, likely either the master or slave cylinder, but it is extremely slow, like it will drain the reservoir over the course of one to two years. Because of this I have felt air in the line before and at the time I thought it was my clutch plate going but after I bled the line and added new brake fluid the clutch felt fine. My clutch also holds under stress tests, so although I can’t say 100% that it’s not a clutch issue it doesn’t feel like when I had air in the line or like the clutch is slipping. It just feels like it’s getting tougher to find gears, particularly first and reverse. In Top Gear speak it’s beginning to feel like I’m “stirring coal”. IDK if a hydraulic/clutch issue would cause this malady though. If it does then I’ll just swap the master/slave cylinders (I’ve just been lazy).