But "tolerant" isn't the same as "as good as hand-written." A hand-rolled recursive descent parser can say something like "missing semicolon after return statement" because the code knows exactly what construct it's in.
A generated parser's error is usually derived mechanically from the state machine, "expected one of: X, Y, Z, got W", which is correct but generic. This is what Yantra does at the moment. Closing that specific gap would mostly require hand-authored, context-specific messages layered on top. But its a good problem to solve.
For yantra specifically, it doesn't have error recovery at all yet. A syntax or lexer error just stops parsing at that point, no resynchronization, no continuing to find more errors in one pass. It's a known, documented gap, not something I'd claim is solved. For the kind of smaller or evolving DSLs this is aimed at, that's probably an acceptable tradeoff, but it does exist as a limitation.