I have an Ampeg stack and a wee Markbass cat D CMD212 combo which sounds amazing. I also had a Helix which had an Ampeg SVT and 8x10 cab simulator. I have to say, while you can somewhat replicate the tone of big bass stacks in miniature, you can never really get the feel of them. The way they pulse the air, the harmonics, the bloom and the trouser flapping. Whether or not you think your tiny amp sounds like a big amp, it kind of does, but really doesn't. It's like looking at a video of an OLED TV though an LED monitor. For recording or hifi pop, yes I agree a small amp will do. For driving rock, funk, blues and metal it really isn't the same. Modern live music calculus says that you should mix everything through FOH, but not everyone wants to sound modern.