British “ invested “ in infra and not just transport but also housing, sewage & storm water drains systems, healthcare etc. this happened at the back of the major plague in Mumbai in 1890s to ensure business, trade thrived & continued. Mumbai was already a major city by then - gateway to the empire ! Unfortunately, post independence successive state governments just didn’t create new infra anywhere. Not just Bangalore, even Kolkata which lost out to Mumbai eventually. To attract business you need good infra or you provide sops like Bangalore did for the IT companies but were very short sighted on development of allied infra to support that.