Linux is based on a legacy monolithic kernel design - everything bolted together at compilation time. Windows is based on a more advanced hybrid microkernel model - meaning that kernel and other modules (not just drivers) can be loaded and unloaded dynamically.
That sounds like something from a salesperson, than from an engineer, by glossing over facts, using throw-away words, generating conclusions to favour your owner. "oh gosh, Linux is monolithic.. we'd better not use it" sigh.
Linux is, in fact, a modular monolithic kernel. You can load and unload modules on the fly. You can even compile those modules so they're part of the kernel.
I'm a Windows user, and even I know that.