The Delhi Nursery admission
I was running some numbers. 2.5 lakh students appeared for the CBSE class 12 exams in Delhi in 2016. And there are barely 5000 odd seats in what may be considered "good or okay schools" (judging on class average > 75% which is hardly a criteria). This is the state of most basic education in the national capital.
Good Delhi chains are expanding all over south India instead of Delhi because no one wants to work under the AAP regime. Shri Ram, Heritage, DPS etc. are all expanding in Hyderabad, Bangalore and Mumbai.
Even having access to a real or fake "Minority exemption" in the case of Delhi, doesn't really mean very much given the land price. With land at 50+ crores per acre who is going to go through the headache of NOC + EC + RTE-quota to run a non-profit under constant harassment from pesky NGOs with excitable activists.
The answer is very simple: real estate barons setting up schools only to prop up land prices. And their commitment to education lasts only as long as flats are sold.
Which is why you see that other than a few stray cases the best schools in Delhi are still the old ones like DPS RK Puram, Modern Barakhamba etc. While it requires at least 2000 good schools.
Plus most of the good schools don't want the RTE quota as it messes up either their exam results or their finances. Chains with a good reputation would rather not expand than lose all admission autonomy and their academic reputation. You can't even fail or weed out under-performers once under the purview of the RTE.
I was looking at the list of top CISCE schools in Mumbai. Each one of the top 9 or 10 schools had quietly marked themselves as a "minority institution" (Gujarati, Parsee, Sindhi, Anglo Indian, Christian and what not) to bypass the RTE quota. Pushing people into this Article 30 bypass opens up a serious problem of its own where a school could even be setup on subsidised land
Three quarters of Delhi government schools don't run a Science section