You reference "Turbobloat" and engines being "bloated" - which is to some extent fair. But it is maybe worth describing what that means to you - what features you consider "bloat" and which you have omitted from the Tramway project. To some the inclusion of an RPG framework may be considered bloat, for example, yet there is one present in Tramway.
Understandable, but the main thing was - you lean a lot on the idea of "TurboBloat" being this universally understood concept. And I think many people might have a vague feeling that a lot of modern software is slow and "bloated", but you may want to be clear on what you consider "bloat".
The RPG engine was just an example of why it may not be such a universal thing, I'm not saying it's bad - but clearly you think that is not "bloat" whereas to some it might be. So it's maybe better to head this off at the pass and just write a little paragraph with some examples of bloat you have observed in other engines that you have consciously avoided in Tramway.
That's why added it in as an optional extension. It is a part of the larger engine project, but it is completely optional.
I like the C++ principle of paying only for what you use.