Whether this technology is new to you or not, glass lined steel is not new; it has existed for over 300 years.  While its usage has changed over time and manufacturing practices have certainly improved, its fundamentals are evergreen.  Today, companies choose to use glass lined equipment for the same reasons they did centuries ago:

Corrosion resistance – glass is extremely resistant to corrosion by acids and alkalis (except for hydrofluoric acid and hot concentrated phosphoric acid)

Anti-stick – many substances will not stick to glass, but will stick to metal

Purity – glass has high quality standards for food and drug applications

Flexibility – glass can handle a diverse range of chemical conditions.

Ease of cleaning – glass-lining surface enables quick, easy cleaning and sterilization.

Absence of catalytic effect – eliminates the possibility of catalytic effect that can occur in vessels made with various exotic metals.

Economy – the cost is comparable to stainless steel and most alloys