So much terrible info in this thread.
I maintain a fleet of 20-30 Trek FX1 hybrids each year for teens that participate in a mentorship program.
The bikes are ridden for 1300-1700 miles each year, depending on the individual.
The components are entry level and come out of alignment more often than higher quality bikes. The wheels are low quality and the source of a lot of frustration.
The 2 constant issues we see are shifting that isnt consistent and wheels that come out of true/axles that break.
The bike are basically indestructible though. Tough frame and tough components in terms of service life.
The frames are great for commuting as they have rack mounts.
The old trek road bike will be a totally different style of shifting and will need maintenance for sure. It's just the reality of a bike thats 30+ years old.
An entry level trek hybrid isnt really any worse than anything else by other brands at the same price point.