Unless you're being targeted as a potential customer or a member of the audience, your mobile performance is irrelevant. What is relevant is that the majority of the devices being used to access sites don't have the performance of mid-high end models.
The common phone is a sub-$100 Nokia or nothing at all?
Even in the US there's something like 10% of people with no cell phone at all, and 50% with "smartphones" which is a very broad spectrum ranging from crap to significant household purchases before considering "data plans" are optional and also range from crap to good.
Even non-phone connection quality can be terrible - I rarely find myself on public or hotel wifi with actually good connections. The difference between 200kb of JavaScript and 10kb can often be measured in seconds.
I actually believe that I did. I understood the point you were making, and I'm pointing out that while your devices don't have that constraint, others may, depending on your target audience.
There are endlessly discussions on here whether to go with an app or web, with many favouring the app angle because of endemic performance issues on the web when you're running on an ultra-low power mobile device.
The web is often death by a thousand cuts. Every decision by itself may seem small, but the end result is an unenjoyable, inefficient, battery-sucking result that leads people to abandon the web.
