I guess if your ears can't hear the difference between analog and digital oscillator, noise generators and filter, then yeah it doesn't matter.
Most synthesists however can hear the difference. Hence the reason why people still uses analogs when digital ones are so much cheaper. The original SH-101 for instance has one of the best analog noise generators I've ever heard.
Not to mention that there' already an SH101 plugout from roland that's only 150 bucks.
Furthermore if you're sampling from a digital source with 'audio in' you're going to encounter a certain degree of diether that you wouldn't get recording from an analog noise source.
I'm willing to be if you side by sided a real sh-101 with the new fake you'd hear why I'm not excited about the digital one.