You didn’t get laid off because you discussed your wages.
You were laid off because you couldn’t keep your cards close to your chest and told the company y’all had been discussing wages.
Having the right to discuss it doesn’t mean you should do it in front of the boss.
As far as I know the 1DXIII is still being produced, nearly 4 and a half years after its launch.
Single lens reflexes have one massive advantage: the sensor is not being used while you’re composing or idle, which means the sensor doesn’t heat up as much. Hot sensors generate noise, which you then have to compensate for (by doing an equal exposure with the shutter closed to remove the hot pixels).
But mirrorless is faster, cheaper to produce, smaller. It’s inevitable that DSLRs will soon be a relic of the past. But they won’t be for a while: 30% of the enthusiast market in 2022 was still DSLRs.