Kudos: Rendering on Old Core i7 Iris Graphics A Lot Better Lately

I have repurposed my old Surface Pro 3 for Zwift (Core i7, 8 GB RAM, no additional GPU, just Iris). This has been very slow and jittery, frequently held frames for a second so etc, around April to may be July 2021 timeframe but sometime after that definitely in August 2021, the rendering has gotten a lot smoother and quite enjoyable.