you must invest at least 2x the cost...
In some cases, maybe. In my case turntables, cartridges, 3x or more was my last upgrade to get a transformative improvement. Significantly better engineering and materials cost a lot more and in some cases, is worth it.
Electronics not so much.
I just bought a new phono stage that cost 5X LESS than what it replaced.
The NODE N130 (2021) is a ridiculous bargain at $400 and easily upgraded with an LPS, external DAC for very reasonable cost.
While I have no doubt a $20K digital source will best my set modest digital set up and the $35K source bested the ICON in subtle ways, there is a LOT one could do with the $34K left over!
@fosolitude If you decide to give it a go, report back please. Amazon allows 30 day returns. I did this with the Eversolo A8 at double the cost - no issues get a speedy refund. Just keep all packaging (obviously) and don’t remove any protective film. Take a pic of how it’s packaged.