As the kaleidoscopic world of weddings and celebrations evolves, so too does the role of the wedding DJ, a pivotal cog in the wheel of matrimonial merriment. This discourse aims to dissect the most recent trends and findings in the wedding DJ industry, unveiling insights that elucidate the nuances of this thriving field.

In the nascent days of the industry, the wedding DJ was primarily a purveyor of music, a facilitator of dance floor revelry. Today, however, the role has expanded considerably. A wedding DJ is now an entertainer, an emcee, a sound and light technician, and often, an indispensable advisor in the planning and execution of wedding celebrations. This evolution has been brought about by a confluence of consumer expectations, technological advancement, and changes in the structure and dynamics of the wedding industry itself.

Statistics paint a vivid picture of the industry's growth. According to IBISWorld's market research report, the DJ Services industry in the US has grown by 3.2% to reach revenue of $4bn in 2020. This surge is a testament to the increasing demand for specialized DJ services at weddings.

The impetus behind this growth is a novel consumer approach towards weddings. The contemporary bride and groom are intent on personalizing their wedding experience, thereby elevating the significance of the DJ who is often charged with reflecting the couple’s unique musical taste. In addition, the DJ is now seen as a guarantor of seamless entertainment, ensuring the smooth transition of the event from one highlight to the next.

Technological advancement has also played a decisive role in reshaping the industry. DJs today have at their disposal a vast array of tech tools, ranging from sophisticated sound and light systems to software that enables them to mix and produce music on the fly. The advent of digital music repositories has revolutionized the DJ’s access to a diverse range of music. Such advancements have allowed DJs to offer a highly customized, superior quality audio-visual experience.

However, the industry is not without its challenges. The rise in popularity of live bands and the surge of easily accessible streaming platforms are significant threats to the wedding DJ industry. This competition demands innovation and versatility from DJs, pushing them to diversify their offerings beyond music curation.

Interestingly, the Pareto principle, or 80/20 rule, seems to be at play in the wedding DJ industry. A small fraction of DJs command the majority of the market share, attributable to their proven expertise, reputation, and often, supplementary offerings such as event planning services. This phenomenon points towards a market that is competitive, yet offers significant rewards for those who can carve a unique niche.

The future of the wedding DJ industry, though subject to the vagaries of economic and social factors, appears promising. An increasing number of couples are willing to allocate a larger portion of their wedding budget towards professional DJ services. This trend, coupled with the industry's adaptability to technological changes, bodes well for its future growth.

In conclusion, the wedding DJ industry has metamorphosed over the years into a dynamic, resilient entity. It is a field that rewards creativity, technical prowess, and an understanding of the shifting sands of consumer preference. As we move forward, the industry's ability to adapt to new challenges while consistently meeting the evolving needs of its clientele will determine its continued success.