Just because it works sometimes for a few months is not sufficient to say that it won't combust after 13 months.

The manufacturer has done stress tests with these chips - many, many of these chips - and noticed degredation/improper operation/bursting into flames and torching a house/stop working in a significant majority of them when operating above these maximum limits. That majority defines these maximum ratings.

In engineering(science) we do not design at the threshold of failure, but incorporate a decent margin of error, considering all of the variables involved with proper IC operation (temperature, operating voltage, etc.) and their effect on the quantum operations the ICs rely on. Exceeding these specifications without knowing what you are doing is gambling with the difference between proper operation and a flaming building.

I'd bet it is quite hard to produce a flaming building with a microcontroller and LEDs. Let's say, not happening.

When you run it from battery, the LEDs are so dim, i removed all the resistors some day, and it was OK.

you can connect a single LED to a button cell and it will be OK too- it will just drain it.

Modern PICs only have 3V supply. Blue LEDs are 2.5v.

I am sorry but I dont see any risk with that- 0.5v will not do anything unsual here.

 

I'd bet it is quite hard to produce a flaming building with a microcontroller and LEDs. Let's say, not happening.

When you run it from battery, the LEDs are so dim, i removed all the resistors some day, and it was OK.

you can connect a single LED to a button cell and it will be OK too- it will just drain it.

Modern PICs only have 3V supply. Blue LEDs are 2.5v.

I am sorry but I dont see any risk with that- 0.5v will not do anything unsual here.

Remind me not to fly in any planes you design!