I don't think so. I know I plugged the railcore before on GJ, just didn't expect to see it randomly.
The only ones that would have negative bias towards a 3d printer are those who don't have the time or are not willing to learn how to setup/use a 3d printer and learn to 3d model. But they are an immensely powerful tool for a workshop, and aren't all the expensive nowadays.
BTW, on topic: I have the Engineer PA-09 crimpers as well. I agree they are fantastic. I struggled crimping small wires for a long time with these bulky cheapo ratcheting crimpers, and on a whim/recommendation, I bought a pair of these, and it's made doing electronics work so much easier. It's hard to explain, and almost one of those things you have to feel. I initially balked at the price, and there's a cheaper set of crimping pliers that are similar, made by IWISS. Supposedly people get decent results with those as well. But I've learned over the years, if you plan on using anything a lot, buy the higher quality tool.
And I haven't completely sworn off ratcheting crimpers. I recently bought a $25 IWISS 3220M ratcheting crimpers. And they do some fantastic crimps in one stroke (as opposed to two on the PA-09). These aren't really necessary to own if you already have the PA-09, but eh... we're on the tool forum for a reason.
https://www.amazon.com/gp/product/B078WPT5M1/?tag=atomicindus08-20