Similar to #3519, when watching logs, or build processes, similar lines being shown repeatedly can often make it hard to determine if anythings happening (as each new page of data looks the same as the previous one)

#3519 mentions smooth scrolling, but it would also be useful to apply some visual effect to old output. This is a bit unusual, I don't know of any other terminal that does this, but it would also be very useful

Eg, remove brightness by X percent for output older than 5 minutes, y% for output older than 15 minutes.