We have much better extraction methods these days using solvents.

More efficient maybe, which isn't really top priority from a user perspective. Personally, I prefer my smoke without a touch of solvents.

Bubble Hash (mixing with ice and filtering frozen resin) is a natural alternative that comes close, but the processing still lowers the quality.

The solvents are evaporated off if you process your hash correctly.

And with solvents like CO2 that evict the chamber without any intervention under STP, it is actually even more certain that the solvents leave.

While I don't share the GP's taste for charas, 'better' is relative. Many people do not care for this industrial approach to something they regard as quasi-sacred, in the same way that many people are turned off by overly processed food.