There are two issues.
The product being discontinued… and then the company going tits up.
When products are discontinued, there are no more software updates.
For your typical amp, pre-amp, that’s not a major concern so they will last and can be repaired to a point.
Its when you have DACs, or anything that are software controlled where you start to run into issues.
In theory they will still run, however some features may no longer work.
Here’s an example. I have an older model Sony 45" flat panel TV that is over 15yrs old… (I think)
It was a smart TV but now apps like Netflix no longer work. So if you want features you need to buy a fire stick or some other TV app device. The rest of the TV works fine.
When the company goes belly up… the same thing applies, however trying to get spare parts or manuals, diagrams etc… goes away too. Also some companies may do a discount trade in on their older products as a way to keep the customer a customer. No company… that’s not an option.
