Removing C++03 compatability from many libraries and breaking Boost.ASIO in 1.87 seriously damaged the Boost reputation.
[Sarcasm ON] As it was not broken long ago. Honestly since C++11 boost become far less essential [Sarcasm OFF] Boost breaking compatibility is the Achilles heel of Boost since I remember it (around 1.33) and it had never changed. It makes Boost highly problematic - almost irrelevant for any long term C++ project that needs to run over a large range of platforms that provide its own Boost. More than that, Boost is almost impossible to use in libraries or other interfaces because of breaking API/ABI virtually in any situation.
If Boost break building via b2 (non-CMake), Boost will damage reputation again.
[Sarcasm ON] I don't think anybody but Boost maintainers will notices [Sarcasm Off] Artyom