[magpi3]

I thought of this. When 2100 comes around, they can just add the third digit (100). They won't have any regrets until the year 3000.

[someplaceguy]

I thought of this. When 3000 comes around, they can just add the fourth digit (1000). They won't have any regrets until the year 12000.

[jolmg]

> When 3000 comes around, they can just add the fourth digit (1000).

or use 3 rather than 1 as the fourth.