With a flick of a pen, the demand will be hot again. All it takes is MY finally confirming and constructing HSR, RTS and PH Ferry, you'll see the demand spike again. I think this is a necessary calm for now, it was really getting out of hand a couple of years back.
I've wondered for some time how HSR or RTS can help in the demand. I don't think HSR is for daily commute. Likely too expensive. And I believe there will still be the long queue at customs. You need to clear both sides first.
Moreover, the HSR may not stop exactly near the property where you live. Still need a car or some form of transport to get you over.
As for RTS, it stops only at the old JB. Still need a way to get around. A car will be best.
RTS and HSR may somewhat ease the jam at Causeway and 2nd link though. This is the only useful point I see.
But... this 2 being mega projects, I don't think they'll be completed so soon. It's too complicated. And knowing how Malaysia works.... I won't be surprised if it takes 10 years or more for completion, IF it really gets done.