Some folks are going a bit overboard here.

The devs came up with an idea (The loader), decided it was overpowered, and redesigned it to not only fit into the game better from a thematic point of view, but also balanced it a bit. However, as any competent game designer can tell you, you can't just ...

Why is this an either/or situation when it comes to the inserters?

You can nerf the max inserter bonus to highlight the difference between the new inserter and the current fast inserter, while still allowing for compact assembler layouts like the current electronics assembly cluster.

You could ...