I'd say some research is needed. Liquid "glues" for styrene come in all kinds of formulations some specifically for certain plastics and hence unsuitable or less suited for other types. I've found that the original Testors liquid solvent in the glass jar was quite good for your standard run of the mill polystrene kits. Their tube cement was the same with a thickening agent added which I have not used for a long time due to issues with precise application. I believe Testors has changed their formula to be less "hazardous" and in response to EPA regulations, and perhaps for other reasons. I've adopted the Tamiya extra thin as a fair replacement, but it is 'hotter' so it evaporates faster & provides for a less 'deep' weld, making application more challenging (Testors is still a good choice for a less hot solvent though it seems to lack the "punch" of the original formula...)
It is always good to keep in mind some basic characteristics for the available 'glues'. On one hand, you have the various solvents designed to chemically weld the parts together, which implies care is needed to ensure compatibility with the materials being used. On the other, the various 'cement' types (CA, epoxies, PVA, etc.) that work by mechanical adhesion between the parts by forming a rigid or semi-rigid matrix at the mating surfaces. For CA, the bond strength is greatest is tension while being relatively weak in shear, so for example, gluing shafts that have to resist torque is inappropriate So good resistance to "pulling" but bad resistance to 'sliding'. Its main use is for quick bonds between dissimilar materials that have some "tooth" or micro roughness on the surfaces (which is why your PE parts should be 'pickled' in an acid before use...) The set time will degrade with time as noted, but even aged CA can work within a micro-matrix field such as provided with micro balloons, paper or even baking soda (if the chemistry is confirmed first.) (CA alone is a poor gap bridge material as it performs best in tight fits.)
Performance of a bond over time is subject to many factors. CA is especially sensitive to weakening when subjected to repeated shear stress, for example when different materials result in thermally induced movement. Epoxies tend to be quite strong in all bond planes and some are slightly flexible as well which helps prevent debonding.
This just scratches the surface of what is really a quite involved subject. Most folks have a relatively narrow range of bonding requirements in their modeling and so settle on what they find works for them. This is not a bad thing, but one should be aware of the limitations of the 'tried and true' approach when trying new things or techniques, or working with new materials. One tip is to use the molding trees to test the compatibility of your modeling materials. Taking time to conduct some experimentation can save on grief later. It does take time however, because allowing for full cure can side track things a bit yet with the benefit of having confidence in the findings.
Even careful checks are not absolute proof against problems, as I found one time when the blob of modeling clay I used as a nose weight managed to melt its way out of my model after a couple of years! (Turns out it was a petro based product - like styrene.)
Hope this is of some use...
Regards, Robert