Your mortgage payment will always stay the same. The only thing that changes when you pay principal early is how long before payoff and the ratio that is split between principal/interest. There's tons of amortization calculators you can use to test it...
Their failure in a vacuum would be one thing, but Witcher 3 literally gave them a blue print on how to write and cast a successful show. All they had to do was literally copy and paste it into live action and they couldn't even do that.
Covered calls aren't going to protect you if they have a large drop in price. If you want to lock in profits you'll need to set stop loses which aren't guaranteed or buy puts