Yes, a company of dropbox's size definitely has an iOS team (not 1 iOS developer). They absolutely have the resources to do this.
But I suppose you're right. Even true of Slack. It's totally a meme that Slack's electron client is horrendous and bloated, but it probably hasn't stopped their growth, so where's the incentive for them to improve it?
What sucks is that server-side performance is their problem, and client-side performance is your problem. It becomes their problem if growth slows or if users leave, but it's often too late.
But I suppose you're right. Even true of Slack. It's totally a meme that Slack's electron client is horrendous and bloated, but it probably hasn't stopped their growth, so where's the incentive for them to improve it?