From what I’ve heard from various rumours and sources over the years, several more operators would be using B8RLE/Wrights, but Wrightbus actively dissuaded sales of the product. Streetlites were persuaded instead being their own integral product, with the few Eclipse 3s built coming at a hefty premium. I’d argue it’s safe to say Wrights have ended their historically longstanding relationship with Volvo now, diesel buses won’t be sold for too much longer, Volvo have a good relationship with MCV now for UK buses, and Wrights have their own integral products.
Another thing to consider is Optare/Switch have struggled for sales in recent years, so will have welcomed a large order for Solos. Wrights on the other hand are at capacity with already long lead times for new orders.