If they aren't a "good platform citizen" at the beginning, it's unlikely they will be later on. This might be something they're willing to accept as it's unlike

If they aren't a "good platform citizen" at the beginning, it's unlikely they will be later on. This might be something they're willing to accept as it's unlikely to affect them directly, but in aggregate, every growth-focused startup building is JS today because it's quick, will result in high powered machines being saturated with slow software. I suspect the effect will be that Apple gets hate for not making fast enough computers with enough battery life, and people reluctantly spend another $1500 on a laptop after 2 years because it's too slow. My advice to the company would be that their target device is almost certainly the base model MacBook Air with 8GB RAM running Slack, a large Excel spreadsheet, and Chrome with 100 tabs of Gmail and documents, and that if they aren't _lightning_ fast on that now they need to optimise soon, because they'll get slower over time.