The whole Canal city (BR, TA, ES, G257) is leasehold.
Despite all the naysayers , LH is really not a big factor.
Well, at least it is not for me. The alternative FH house I was looking cost 150k -200k more => have to take a bigger loan. The average yearly land lease renewal premium is much much cheaper than the additional interest on the 100k-200k loan. Besides, if I really want to pass on to my kids or my kids want to pass it on to their kids, just pay the 1k lease renewal premium lah.

From what I have observed, lots of home upgraders from KK, USJ, and nearby township here.
e.g.
There are lots of reasons,
Most people want bigger landed houses e.g. smd, bungalow, superlink,
Most people want newer homes, 
Some buyers want better floor plans e.g. some want open floor plan , some want living room that backs to a backyard garden.
Some want better environment for their kids to play etc
Some buy because they want to be close to their parents in KK.

Some ES folks like its modern contemporary architecture and resort-like facilities.
Some ES folks like to live among the rich upper middle class in a new nice landscaped township.
For them, the more expensive, the better. It helps to automatically filter out their neighbours. :-)

Some people like to live in an area with lots of Chinese buyers with existing Chinese school nearby in KK, Bukit
rimau etc and with new one under constructions.
Some people buy due to having two International schools in the mega townships. They want their home location to be close to these schools.
Some airline pilots, staffs buy because its just a short drive to KLIA.
Some people buy due to its future potentials. e.g. accessibility - new highway, unannounced future public LRT, MRT lines.
Some want Klang Valley south instead of KV North.
Some people like to live in a new township and watch it grow.
Some buy to speculate.

Everyone's criterias and reasonings are unique.
Obviously, those things I listed above can be found some where else in Klang Valley too.
What make sense for one person, may not make sense for another person.
It is all up to the individual home buyers to decide.