Customers would miss Bentley acutely within its niche — 99% retention reflects software welded into decade-long engineering workflows — and its growth is socially constructive with no meaningful regulatory threat, making indispensability-plus-sustainability one of Bentley's strongest dimensions. On indispensability, the evidence is concrete. Account retention runs 99% and dollar-based net retention 109% because tools such as ProjectWise, MicroStation, OpenBridge, AssetWise, and Seequent's subsurface software become tied to engineering standards, data structures, and the institutional memory of projects that last for decades. Pulling Bentley out mid-lifecycle would strand asset data and disrupt active design and operations work, so for civil engineers, utilities, transport agencies, EPCs, and owner-operators the switching pain is severe. The honest qualifier is that this is mission-critical indispensability to a relatively narrow set of professional users, not mass-market or consumer indispensability — but within that set it is deep.
On social and regulatory sustainability, Bentley is on the right side of the ledger. Its revenue comes from helping design, build, and operate roads, bridges, water systems, power grids, tunnels, and industrial plants — value creation that is societally useful rather than extractive, addictive, or privacy-eroding. There is no antitrust, content-moderation, or consumer-harm overhang of the kind that threatens some high-growth software. If anything, regulation and public policy are tailwinds: the roughly $1.2 trillion U.S. infrastructure law, grid modernization mandates, and utility-capex programs expand demand rather than constrain it.
So the growth is sustainable in both senses the question asks: it does not depend on harming society or on a regulatory loophole, and customers would feel real pain if Bentley vanished. The only caveat is breadth — the company is indispensable to its professional niche, not to the broad economy, so its "how badly would they miss it" answer is intense but narrow.