12! is only 479,001,600, easy for a computer to bruteforce search.
Ahahaha.... imagine spending 2-3 years in a row just if u lose one to introduce like 500K combinations. (Probably it will be worth it and the motivation would grow even higher when seeing the price rise!

)
Edit: Probably developing your own software to interact with the wallet and introduce each combination would be more efficient. Also you can make a blockchain just for that! And basically you can use the network as an addon app to compute the missing numbers or letters with brute force!

Talking about brute forcing some lost words from a seed. Often you see the maximum number of attempts calculated. But you would have to check whether there is a bitcoin balance as well after each attempt. That would make the brute forcing considerably slower?