First off, thanks again to all the devs. You folks work hard enough for all of us- please don't spend a second working on anything that can be accomplished with a GRF. (Unless you're working on a GRF, of course.)
Just thought I'd put in my two cents worth on reliability.
One of my very few pet peeves with TTD/OTTD is that a brand-new locomotive at the end of its production run is far less reliable than a mid-production unit.
IMHO reliability should decrease (from the maximum effect when the vehicle was purchased) as the vehicle ages. When reliability gets to be a problem, replace the vehicle. The more life remaining, the cheaper the net cost of replacement, representing a major rebuild.
Some vehicles will historically have low max reliability, but this may be offset by unique performance, such as early high horsepower diesels, etc.
For those folks who want to keep steam locomotives around into the 2000s, they can turn "vehicles never expire" on. When a steamer wears out, you can then purchase a new one at it's inflation-adjusted price.
This is accurate, because restoring a steam locomotive can be as expensive as building a new one.
Here's an idea- would it be possible to hide the reliability rating of units while under the "one year test" provision? Then you won't know exactly what you are getting into.
Those early production units will keep their reliability problems until replaced (rebuilt).
(reason: learning dvorak was so boring so I learned dvorak instead 
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