There are still TD machines (the big ones that dispense/accept up to 200 notes) that have 10s. For now at least.
It seems as if, usually, when at least one ATM discontinues dispensing a certain denomination, eventually all ATMs will be involved. When RBC discontinued dispensing $5 bills starting in 1999, smaller branches were likely the first ones to be affected. More and more ATMs dropped $5 bills, and ATMs at the big (or main) branches were the last to discontinue $5 bills around 2002 - however ATMs at colleges and universities were still dispensing $5s for at least a few more years, but I heard rumor that they may have been replaced with $10 bills by 2006 supposedly due to inflation - at least the university in my hometown.
I have a feeling that if some TD and RBC branches discontinued dispensing $10s from their ATMs, it's likely possible more will be coming. If the main/big branches are still dispensing $10 bills, it won't be long before they cease being dispensed. Usually the big/main branches' ATMs are the last ones to be modified.
The $10 bill phaseout has only started recently, and I bet such phaseout from TD and RBC ATMs will be much quicker than when RBC ATMs phased out $5 bills (the latter phaseout took about three years).
The newer Scotiabank ATMs that dispense multiple denominations were already ahead of the game - they never dispensed $10 bills from the get-go. The newer ATMs, that is. Scotiabank knew well ahead that demand for $10 bills was quite low - so it's quite surprising that RBC and TD were late to the party.
I also wouldn't be shocked if those banks that stopped dispensing $10s from their ATMs, the branches probably discontinued ordering $10 bills for over-the-counter transactions. If any such branches discontinued ordering $10 bills for over-the-counter transactions, please share.
I also agree that the phaseout of $10s from the newer TD and RBC ATMs is likely a nationwide change.