However, other than that, you can experiment more with software. The biggest plus for software is that it’s much cheaper than hardware.
And while having hardware is probably the most fun way to explore modular synthesis, there are some unique advantages to having software plugins. You could use complex filter chains, feedbacks, or parallel processing to achieve sounds impossible to reproduce via traditional synthesis. The most sought-for feature of a modular synth is its endless possibility of sound design. Similarly, most software versions come with a package of a large variety of modules or offer separate purchases to build your unique synth. For example, in hardware, you could use a Korg oscillator with a Behringer Filter and a BOSS distortion. Modular synths work by connecting compatible modules together.
This technique lets you have complete control over the synth’s signal chain and achieve as complex a setup as you want. Modular Synthesis is the system of synthesis where you connect individual modules of oscillators, filters, effects, modulators, utilities, etc., to create a unique synth setup.