Yes like for tysse. If they did elevated but but made beautiful stations, the cost would be much lower, with really unique station design. I dont think it would be such on issue. But they decided to deep bore through industrial and sfh.BTW, you can see this with Metrolinx’s designs for the OL bridges over the Don Valley: they could go for something ambitious, with a sense of place, but no - so far the plan is a concrete guideway.
The issue is at least partially public literacy: people point to the ‘palatial’ TYSSE subway stations as the reason for cost overruns, and even on this forum people have singled out public art (until it was canned, ML’s public art component was 1% or less of total costs) and public realm as contributing to escalating public costs - while the real reason is our overuse of TBM, inability to bank ROWs, political dithering and more.