Read my reply down the page a bit. They will not flower themselves to death but they will not look great either.
The Phal mentioned in the other thread has been out for three months and has been to an orchid show and three monthly orchid society meetings. It needs a break!
Good to hear a success story with Phals.

Orchids can survive indefinitely without flowers. What can kill them is an unhealthy medium. Imho, if you're going to repot phals, they should be repotted by Aug.-Sept. in order for roots to become well established by the time the flowering cycle begins later in the year.

For me, it's a no-brainer. Sacrifice the flowers now and repot for the benefit of the plant. (A respected member of our orchid club cuts all the flowers off her plants after the spring orchid show so that the energy goes into making the plant stronger for the following year. I'm not at that point yet as I leave my flowers on until mid-summer, but it illustrates my point.)

I laughed to myself when you mentioned repotting into a "proper orchid-bark medium." I know people have success with a bark medium for phals, but I never did. I grow all of my 25-30 phals in straight long-fiber sphagnum (with styrofoam peanuts in the bottom of the pot for drainage). It might be possible your phals are blooming so well because they like the moss they're in, even with the over-crowding. Personally I would recommend moss in your situation since you live in Canada. Those long winters can make it difficult to keep a bark medium suitably damp for phals.

wuness

I'm new with orchids but i wanted to share this with you. I bought an orchid with lots of flowers about 6 or 8 weeks ago. It was in sphagnum so tight in a clear plastic container that was afraid to leave it in there. So I very gently removed the moss and replaced it with fresh loosely packed sphagnum. It is still blooming with not one flower dropped. I say, go for the repotting now before you lose all the roots to rot.