[brigandish]

Does not, in the seeming absence of other snappy examples and the overwhelming evidence of many, many slow React apps, the exception prove the rule?

[scq]

There are plenty of snappy examples. Off the top of my head: Discord, Netflix, Signal Desktop, WhatsApp Web.

[genthree]

Those are all really poorly-performing.

[TeMPOraL]

Discord, maybe. But Netflix and WhatsApp Web? Those are bloated cows, just less broken than average.