From the intro to Boutique Basses article in the Holiday 2008 20th Anniversary issue of Bass Player:
The original bass guitars were workaday tools designed for reliability, strong bass response, and cost-efficient manufacturing. But in the early '70's, Alembic changed all that. Prodded on by its hard-touring, musically experimental clientele (the Jefferson Airplane and Grateful Dead among them), Alembic instruments' exotic woods, custom-machined brass hardware, hi-fi electronics, and exquisite attention to artistic detail created an entirely new product category. These innovations continue in today's boutique basses, but it's the collaborative nature of the builder/bassist relationship that remins the defining characteristic of boutique bass building.