Strangler fig is a sequencing principle, not a migration strategy
The strangler fig pattern is one of the most cited approaches to legacy modernisation. It is also one of the most misapplied. What it tells you is how to sequence, not what to build.
The hardest part of legacy modernisation is rarely the technology
The technical challenges of legacy modernisation (migrating data, rewriting integrations, retiring old platforms) are real but solvable. What consistently derails modernisation programmes is the organisational and cultural dimension: the fact that legacy systems have owners, workarounds have become processes, and the people who know how the old system actually works are the same people being asked to replace it.