Our home has manufactured wood flooring, installed 20+ years ago. It was glued to a masonry solid floor when installed and has held up well over time. Nothing is delaminating, or peeling, it's very solid.

The wife would like LVP installed, the options are:

1) Rip up 2200 sq foot of glued down flooring, then install a new LVP floor over the concrete ,or

2) Install the LVP over the manufactured wood.

Besides the difficulty, mess of and cost of of tearing out the existing glued down wood floors, it would be easier to remove the 1/4 round toe strip and lay down a cork or factory backed LVP product right on top of the existing floor.

The prevailing question is can we put the new LVP right on top of the existing floors, if we do, are there any pitfalls regarding how the flooring will stay down since it's all about weight and not about adhesives.

Concerns of course are buckling or popping up planks, issues with any moisture that might get trapped coming up from the existing flooring which is manufactured wood glued to concrete.

Put the LVP right on top. Most of it is designed to be pretty impervious to some of the other issues you mention, so I wouldn't worry about it much.

The buckling issues are caused by not giving the floor enough room to move, so just make sure you follow the manufacturer's directions and leave the requisite amount of space around the edges to allow for expansion.

Just had about 1K square feet of LVP installed (by pros) over hardwood. Laid down a thin underlayment and it went right on. Free floated with a little quarter round trim against the existing (now undercut) baseboards.

No issues so far.

-RWB

Do your doors have enough space at the bottom to clear the height of the additional flooring when you open them? I think if you use a premium underlayment, you'll be fine putting it over so long as the doors don't all need to be trimmed.

Fix the obvious deformities and make surface level if possible but flat.
Lay down underlayment with vapor barrier.
Put down your LVP.