BU is just one of many implementations that took CORES 0.12, and made tweaks.
now knowing a few of them bugs didnt get fixed until core made 0.13. so ofcourse the core devs didnt think to also include them by patching their own older repo's to match.
EG core didnt fix 0.12, they called it dead and just put patch into 0.13. meaning anyone who uses 0.12 will still have cores bugs.
it wasnt core that fixed BU either. bu fixed a bug. but then core highlighted that not everyone with BU updated to the new version without the bug
but funnier part.. because BU and dynamic implementations believe in PEER diversity.. the bug didnt cause drama.. it just took out a few nodes while the rest of the network continued... you cannot say the same if everyone is FORCED to use the exact same core base code in cores tier network.. if core gets a bug.. expect bigger issues (such as the 2013leveldb update bug)
but the real question is. where are all of these "independent devs".
oh yea, they are dependant on gmaxwells leadership.
if you want true independent diverse decentralised bitcoin.. then dont throw all your dreams, kings and asskissing into one camp.. instead let there be no single camp and let the devs migrate freely without being tarnished by REKT campaigns if they are not in core camp.
remember devs are not immortal. devs do come and go, move onto different projects, get bored. etc. so dont kiss devs asses. just think about bitcoin as a diverse and OPEN decentralised network.
core mindset
"i pretend to be independent but refuse to independently review anything thats not gmaxwell sanctioned"
"i pretend to be independent but argue anything thats not gmaxwell sanctioned has not been independently reviewed"
"i pretend to be independent everyone should only use core"
total hypocracy and mindlessly handing control of the previously open divers peer network over to gmaxwells corporate tier network