Hyperion

This is very interesting project. It's not replacement for Reaktor. You can't build custom synths and custom blocks here. User base is much smaller compared to Reaktor and there is no site where users can share their patches. Also no SDK for writing/porting own modules.

it's modular synth with layers and polyphony, you build your own synth from provided components. Some components have features not found often in main stream synths. GUI is easy to work with, I like wires more then in Reaktor; more complex patches are easier to build then in competitive products (cherry audio, soft tube, VCV rack).

Sound is nice, but there is no wave table synth with ability to load surge, vital, serum wave tables. You can only morph between waves. For sound design it's not a big difference but people would like to import their tables. It should be viewed as digital synth, not analog emulation. It has some filters inspired by vintage analogs but sound is nowhere close as other vendors (KORG, NI, Air Music tech) can do.

overall sound is nice. If you build own sounds and feel limited by number of LFO, envelopes in standard synth you will like this product. It can do FM4 synth with multiple algorithms but there is no DX7 compatible mode you can turn on and load half of DX7 patch.

Interesting feature is that this synth can generate MIDI CC messages. You can use it for example as fancy envelope generator.

I noticed that during Black Friday lot of people purchased competing modular synths for 40 USD. I can understand it - it will be unlikely your daily work horse synth (no downloadable extra presets, design sound is slower), so you do not want to pay much.

product is definitely worth checking. It's single developer project but unlike similar products distributed by Tracktion, author is communicating well. So, I think it's good to buy synth and give him chance to hire more developers and let Hyperion grow.