I didn't say it was a good idea but doable. When routes have been fully converted to LF, other than 504/514, they have reduced the number of cars operated. We know that ridership is up but service seems to be adjusted to keep the "number of seats" about the same because there is no budget to really increase service. I agree more service is needed and CLRVs could be replaced one for one with Flexity cars and there would still be crowding, but unless there's pressure to actually increase service by keeping the number of cars operated constant after the conversion, 501 and 506 will run with fewer cars, and will keep bus trippers. TTC management has made its decision on the retirement of the CLRVs this year, rightly or wrongly based on what we've been hearing.
I'd like to think some will continue running into 2020 to keep service levels up as there is no way all the Flexity cars can be in service by this year at the current rate.
PCCs were supposed to be fully replaced by ALRVs in 1988 but record ridership meant service had to increase and they lasted a couple of extra years and we have a similar situation today.