Why do people get peeved that their bike is discontinued? It won’t make any difference to it,
Resale value is definitely a factor… A used Five lost about half its value the day they announced it was “obsolete”, partly because new stock went straight in the sales and partly because fickle mountain bikers don’t want the old model, even if yesterday it was the new model. If you bought a Five the day before they announced the 650b Five, you took a knee square in the assets.
Why does that matter? Well, for most people with a decent bike, the value of that forms a part of the budget for their new bike. If my last bike had taken a big hit on value, I’d not have been able to buy my current bike.
The other thing is just parts transferability- the wheels and forks in my hardtail have been in at least 4 different frames, but if I buy a new frame tomorrow I’ll need to replace both (and again, the old parts are already worth less). So again it hits you in the wallet. And ironically, will probably mean I buy less bikes/bike parts for the forseeable future.