Part of the problem is the business model allows for some shady practices like selling $1 services for $0.80 to kill competitors (like the taxi industry and other startups in the same space). Then raising prices to $1.30 over 20 years.

I don't think it works though. It just ends up with everyone dead and us buying enshittified taxis at 2-3x the price later because nobody else has a ride sharing app.

They lied on the app about how long the cars would arrive, so people opted for Grab when booking on both platforms. They'd offer bonuses to drivers that were impossible to obtain (e.g. drive to a location without road access). They'd offer X in bonuses then pay out 0.7X, taking a cut from the promised bonuses and from tips. Uber would loan money to drivers and then let the drivers they banned keep the loan. Grab would withhold payment to drivers, ban drivers who got less than say, 4.5 rating, then not pay out the drivers they banned.

All fair game, all legal. The rough play helped them win, or so they think.

I've had requests from 3 people who wanted to build a ride hailing app. It's not worth the time and I'd discourage anyone who thinks they could stand up to Grab with just implementation ability. But if there was a code base, I'm sure some would be happy to take the mantle.