Interior Design Substack alert! AD PRO has an exclusive early excerpt from Jeremiah Brent’s new Substack. Read it here. If it feels like your inbox has gotten crammed with emails inviting you to “Join me on Substack!” you aren’t alone. Arriving at a time when many consumers—long checked out of traditional publishing—were reaching Instagram and Facebook fatigue, Substack in many ways felt like a salve—a font of long-form, personality-driven content, featuring stories and opinions too impolite to appear elsewhere. While the design industry—still deeply wedded to Instagram—hasn’t been a major player of the Substack universe, that’s changing. AD100 Hall of Fame designer Kelly Wearstler , who launched her Wearstlerworld newsletter in December 2024, has become the reigning queen of capital-D Design Substack, amassing over 42,000 subscribers to date.…