doesn’t pass the bounce test.
I am very much a minimalist when it comes to garden mulches. I put down a thin layer of pine chunk nuggets when I plant to hold a bit of moisture and to inhibit weeds until the plants are established.
Then, I forget about it. If the mulch floats away, blows away, decays, or is stolen, I don’t care. Some plants will get an occasional topdress of leaf compost, but everything’s so jammed together that there’s little room or need to add more mulch.
I don’t need, or care about, a mulch that will last forever, so I had little interest when rubber mulch (recycled from tires) was introduced. I pronounced it too expensive and only gave it a second thought with infrequent customer inquiries.
I’ve heard rumblings about chemical leaching or other negatives, but a look at The Garden Professors blog ends further discussion in my mind.