Reliability is definitely important but it's notoriously hard to market. Miele appliances are reputed to last twice as long as most competitors, but that's not actively marketed either, much less given awarded on.
Generally the only place where you'll find this information is during highly detailed teardowns in which a highly experienced professional will comment on the selection of components and rationale for certain internal designs, and that doesn't guarantee high reliability either as defects are rarely obvious at a glance like that Lenovo phone that easily snaps in three. So you can look for a reputable brand, identify additional costs that go toward reliability, but everything must stand the test of time.
And I really wouldn't count on a warranty. It varies greatly with many factors and a brand that doesn't vary...probably provides very poor value enforcing that uniformity of service.