It wasn't even close and the BC Liberals also picked up Skeena.  While the Lower Mainland swung heavily towards the NDP thus why the BC Liberals lost their majority, the interior swung towards the interior.  Housing affordability was a big issue in the Lower Mainland which hurt the government, but not so much in the interior while resource development is important there and many blue collar workers have swung over to the BC Liberals due to being pro-development.