Who actually uses these products,
and what made them stay.

The Slack-Drowning Knowledge Worker

A full-time knowledge worker — marketer, PM, ops, customer success — at a company large enough that Slack has become the ambient noise of their workday. They didn't design the channel structure they live in. They inherited it. They have 12 unread DMs, are mentioned in 3 channels they rarely check, and have muted so many channels that important things occasionally slip through the cracks. They're not bad at their job. They're bad at Slack because Slack has become its own job.

“It happened mid-workflow — it's 10am.”

The Twilio Communications Builder

A backend developer or full-stack engineer who integrates Twilio for transactional SMS, voice calls, or WhatsApp messaging. They're not building a call center — they're adding "send a verification code" or "notify the driver" to an existing product. They understand the API well enough to send messages, but the telecom layer underneath — carrier filtering, number provisioning, regulatory compliance — feels like a different industry entirely. They write code that talks to phones, and they've learned that phones are unreliable in ways servers are not.

“The developer ships a phone verification flow.”