Just changing to a new numbering system when they run out.
I wonder what the practical reason is for not just allowing full alphanumeric number plates. Each digit would then have 32 possibilities (I, O, Z, and S should be avoided to prevent confusion with 1, 0, 2, and 5). This gives 34.36 billion possible number plates which seems sufficient for at least the next couple years.
Perfectly mildly interesting
They could pull an Illinois and restrict the number of digits.
I’ve always thought it dumb that the nation’s most populous state only uses seven of the possible eight characters on a license plate. Most states only use seven, but a dash separating letters and numbers means there is actually room for eight characters and many states will allow you to use all eight for vanity plates.
The hyphen helps people remember partial plates, and you can look up a vehicle fairly easily with a partial plate, color, make, and/or model
T28-5U47 vs T285U47Y
Chances are you’ll remember T28 or 5U47 more than T285U47Y.
They’re switching from 0AAA000 to 000AAA0. When that arrangement runs out they’ve still got A000AAA, AAA000A, AAA0AAA, and 000A000. Then they can start using letters and digits in pairs or fours. By the time they run out of everything cars won’t have license plates, or won’t exist, or neither will we.
Add a 0 in front of every plate and it is fixed