Ironacally, Slack IS using at least couple of fads on a product-defining level: Hack is dead by PHP 7 and PHP 8 will dance on it's grave this year. Electron is awful when used atop of big JS framework-based apps (it is more or less okay with nicely crafted Vanilla JS).
And at the same time it is a great commercial success. This last one I cannot understand.
Commercial success has little to do with your tech stack choices. I don't understand why people are so obsessed with jumping ship for the latest shitty framework just as the old one is getting really good and stable.
And at the same time it is a great commercial success. This last one I cannot understand.