Abstract bloat indeed doesn't matter. What matters are user and developer requirements and the technology choices made to meet those requirements. Slack is a favorite punching bag but guess what, most people are happy to use Slack because it looks pretty and works better than most other chat applications.
Yes and no, in the sense that if you have 10 apps that are resource intensive as Slack at some point you'll think your computer is slow and if you can afford it you will change it to a "faster" option.
And maybe you'll never find out that the problem were 10 developers who never cared about resource usage.
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