Meridian are no better nor worse than other companies in my experience.
Following the woes of owning a Meridian G95, I vowed to never own Meridian again. Even so, trying to obtain basic pre-sales information from other manufacturers was worse than trying to get blood out of a stone.
As for repairs, most, if not all, audio manufacturers utilise custom surface-mounted electronics. If just one component on the board fails then the whole board becomes scrap. Once a device reaches end-of-life, and production of the surface-mounted boards ends with them, your whole device is living on borrowed time if the manufacturer hasn’t sufficiently stockpiled the relevant surface-mounted boards.